Dosya uzantilari ve ait olduklari programlar

DOSYA UZANTILARI VE AIT OLDUKLARI PROGRAMLAR 

AAAAAAAAAAAAAAAAA http://pulsar.sitemynet.com 

.A UNIX Library [UNIX] 

ADA Program 

.A01 ARJ Multi-volume Compressed Archive (can be 01 to 99) (also see .000) 

.A01 - .A10 OzWin CompuServe E-mail/Forum Access SYSOP File 

.A06 Lotto Pro 2002 Smart Number Ticket 

.A11 AIIM Graphic 

.A31 Authorware 3.x Library 

.A3D Amapi 3D Modeling 

.A3K Yamaha A3000 Sampler File 

.A3L Authorware 3.x Library 

.A3M Unpackaged Authorware MacIntosh File 

.A3W Unpackaged Authorware Windows File 



.A4M Unpackaged Authorware MacIntosh File 

.A4P Authorware File Without Runtime 





.A64 Artist 64 [XnView] 

.A8 Cubicomp PictureMaker 24bit 3D Animation (DOS-based animation program; graphics cards external to 

computer; Cubicomp closed 1990) 

.A86 A86 Assembler Program File 

.AA Audio Book File 

PROGNOSIS Automated Analyst Document File 

.AAB Macromedia Authorware Binary 

.AAC Advanced Audio Coding File 

.AAM Authorware Shocked File 

.AAO America's Army Map 

.AAS Authorware Shocked Packet 

.AAT Arcinfo Line Data Attribute Data (GIS-related file) 

.AB Applix Builder File 

.AB2 Parson's Address Book 

.AB3 PhotoImpact Album File 

.AB4 ENIAC Computing AB4 Accounting & Business File 

.AB6 AB Stat Data 

.AB8 AB Stat Data 

.AB$ AutoCAD Spooled Plot File 

.ABA Palm Address Book File 

.ABC Flowchart 

Musical Notation Language File (folk melodies originally) 

.ABD AmBiz Bonus Calculator Data File 

Adventure Builder Database 

.ABF Adobe Binary Screen Font 

.ABK Corel Draw AutoBackup 

Any Automatic Backup 

.ABL Maxagrid Avails Data File (text format) 

.ABM HitPlayer Audio Album File 

Photo Impressions 2000 Album 

Album File (various) 

.ABO Applix Builder Turbo File 

.ABR Photoshop Brush 

.ABS Abstracts 

MPEG Audio Sound File [MPEG] 

PC GNU Compiler Output

Abscissa Data File 

Optocat [XnView] 

.ABT The Arbiter Sports Official Schedule [Viewer] 

.ABW AbiWord Document File 

.ABX WordPerfect Address Book File 

.ABZ AbszOrb (textured spinning orb creator) 

.AC CaseWare Working Papers Client File 

.AC_ CaseWare Working Papers Compressed Client File 

.AC$ AutoCAD Undo Info 

.AC3 AC3 Audio File Format [DVD Maestro, DVD Conductor] 

.ACA MS Agent Character File 

Project Manager Workbench File 

.ACB ACBM Graphic Image 

AOL Cab Launcher (archived data file) 

.ACC DR-DOS Viewmax File 

.ACD Chromeleon Channel Raw Data 

Sonic Foundry Acid Music File 

allCLEAR Flowcharting File 

MS Agent Character Definiton File 

.ACE The Ace Archiver Compressed File 

Aces200 [XnView] 

.ACF MS Agent Character File 

Photoshop Custom Filter 

.ACG MS Agent Preview File 

.ACH Rockwell Software Logix 5 File 

Speccy Snapshot 

.ACI ACI Development Appraisal 

.ACL Corel Draw 6 Keyboard Accelerator 

MS Office AutoCorrect List 

ACL For Windows (data mining software) 

Access Control List 

.ACM Audio Compression Manager Driver (Windows) 

Photoshop Command Button 

Windows System File 

ACBM Image File 

Interplay Compressed Sound File 

.ACO Photoshop Color Swatch File 

.ACP MS Office Assistant Preview File [Buy Office XP at Shop.Microsoft] 

File Used by Adobe Acrobat Paper Capture 

.ACQ AcqURL File (bookmark manager) 

.ACR American College of Radiology File 

Dicom [XnView] 

.ACS MS Agent Character File 

.ACT MS Office Actor Program File [Buy Office XP at Shop.Microsoft] 

FoxPro Documenting Wizard Action Diagram 

Photoshop Color Table 

Action! Presentation 

DataWave Physiological Data File 

.ACU AppleLink-PE Compression Format (created by Floyd Zink; overtaken by Andy Nicholas' ShrinkIt; 

ShrinkIt should unpack) 

COBOL Intermediate Object File 

.ACV OS/2 Audio Drivers 

Photoshop Saved Curve Also see 

.ACW MS Accessibility Wizard Settings 

.ACX FOCUS/WebFOCUS File Description 

.AD AfterDark Screen Saver 

Ascend Password Protocol File 

.AD! OzWin CompuServe E-mail/Forum Access QS-Special - Get Marked Online 

.AD2 2-bit Compressed Voice File 

.AD3 3-bit Compressed Voice File

.ADA ADA Program File 

ActiveDocs Answer Set 

.ADB ADA Package Body 

HP Organizer Appointment Database 

.ADC Chromeleon Demo Data File 

ActiveDocs Clipping Catalog 

Scanstudio 16-color Bitmap Graphic File 

Lingvo Dictionary Text File 

.ADD OS/2 Adapter Device Driver 

Adobe Pagemaker File 

Advantage Database Server Data Dictionary 

.ADE MS Access Project Extension [Buy Office XP at Shop.Microsoft] 

ADC Audio File 

.ADF Adapter Description File 

Admin Config File 

Amiga Disk File (Uncompressed 901120 byte DD Diskimage) [Amiga Forever] 

Dog Creek QC Mask File 

ReliaSoft ALTA 1 (Quantitative Accelerated Life Testing Analysis Software) 

.ADI AutoCAD Plotter File 

Advantage Data Server Database Index File 

.ADJ LISCAD Plus Adjustment File 

.ADL QEMM MCA Adapter Description Library [MCA] 

OzWin CompuServe E-mail/Forum Access QS-Special Get Marked 

.ADM After Dark Screen Saver Module 

Windows Policy Template 

Addict Compiled Dictionary 

Advantage Data Server Database Memo File 

.ADN 1-2-3 Add-in Utility 

MS Access Blank Project Template [Buy Office XP at Shop.Microsoft] 

.ADO Photoshop Duotone Options 

Stata Program 

.ADP FaxWorks Modem Setup File 

Astound Dynamite File 

MS Access Project [Buy Office XP at Shop.Microsoft] 

AOLserver Dynamic Page File [AOL] 

.ADR After Dark Random Screen Saver Module 

Address Plus Database 

Smart Address Address Book 

Address Book 

Opera Web Browser Bookmark File 

.ADS ADA Package Specification 

.ADT HP NewWave Card Application Data File 

Advantage Data Server Database File 

Lingvo Dictionary File 

AdTech Fax File 

.ADV GUS Virtual Device Driver 

.ADX Lotus Approach Index File 

Archetype Designer Document 

Dynazip Active Delivery Script 

Sega Dreamcast Audio File [Source of files] 

.ADZ GZ-Packed Amiga Disk File (see ADF) [Amiga Forever] 

.AE SoftQuad Author/Editor File 

.AEF ELECTRICAL Designer 

.AEH iPer Advanced Embedded Hypertext 

.AEP ArcExplorer Project File 

.AER Adobe Atmosphere File [As of Mar 2002 in beta] 

.AEU MS AutoRoute Express Europe Route 

.AEX PGP Armored Extracted Public Encryption Key [PGP] 

.AF2 ABC Flowchart (Now Micrografx FlowCharter) 

.AF3 ABC Flowchart (Now Micrografx FlowCharter)

.AFC Apple Sound File 

ArisFlow Commander File 

.AFD ArisFlow Diagram 

Prismo Graphics ActiveFile Data 

.AFF AnyForm Form 

.AFI Truevision Bitmap Graphic 

.AFL Lotus Font 

.AFM Outline Font Metric 

HP NewWave Cardfile Application 

LOUT File (High-Level Language For Document Formatting) 

.AFP Flowchart Symbol Palette 

Papyrus Document Storage Format 

Prismo Graphics ActiveFile Proxy 

IBM Transactional Data Format (Advanced Function Print) (AS400 computer) 

Gangsters Game File (unverified) 

.AFS Filter Factory Photoshop Filter [Added] 

Sega Dreamcast Compressed Audio 

.AFT Flowchart Template 

AnyForm Template 

.AFW Flowchart Work Area 

.AFX Auto FX Photographic Edges (Photoshop add-in) 

.AG Applix Graphic 

Argus Spreadsheet File 

.AG4 Access G4 File [Buy Office XP at Shop.Microsoft] 

.AGF Atlas GeoFile 

.AGP Aspen Graphics Pages 

.AGW Aspen Graphics Windows 

.AHF ASP Header File 

.AHQ AudioHQ Plugin Module 

.AHS Photoshop Halftone Screens 

.AI Adobe Illustrator Vector Graphic [XnView] 

Corel Trace Drawing 

Progress Database After Image File 

Advantage Database Server File 

EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename starts 

with E] 

.AIF Knowledgeware Setup Information 

Audio Interchange File [IrfanView] 

SymbianOS Application Information File (set application properties) 

.AIFC Audio Interchange File [IrfanView] 

.AIFF Audio Interchange File [IrfanView] 

.AIH ArcView Optional Index File (GIS-related file) 

.AIJ Oracle After-Image Journal 

.AIL AutoImager File (batch image conversion) 

.AIM AOL Instant Messenger File [AOL] 

.AIML Artificial Intelligence Markup Language 

.AIN AIN Compressed Archive 

ArcView Optional Index File (GIS-related file) 

.AINSO VAX CRYSTALS Chemical Crystallogaphy File 

.AIO APL File Transfer Format 

.AIP Audiosoft Parameter File 

.AIQ AzureIQ Client File (IT Audit Reporting) 

.AIR Align It! Resource File 

Flight Simulator Aircraft Performance Info File [Free Flight Dynamic Editor] 

.AIS Array of Intensity Samples (Graphic) 

Velvet Studio Instruments 

ACDSee Image Sequence File 

.AIX HP NewWave Cardfile Application Data 

.AKF Acrobat Key File 

.AKW RoboHELP Help Project Index File

.AL Oracle File (used for networking) 

.ALA Alan Adventure Language File 

Sharp Fax File (unverified) 

.ALB JASC Image Commander Album 

Steinberg Cubase or VST Backup Song File 

Photo Soap2 File 

.ALBM webAlbum Photo Album 

HP Photosmart Photo Printing Album 

.ALC Norton Internet Security Ad Server File 

MP3 Embedded Dynamic Lyrics 

.ALE Avid Log Exchange 

.ALF Abacus Law File 

ALF Logic File ("Another logical framework"--structure editor for Martin-Löf's monomorphic type theory) 

AdventNet Look and Feel Standards (ALFSTANDARDS.ALF) 

Aventail Connect License File (AVENTAIL.ALF) 

VPCom Remote User Configuration File 

LANDesk Client Manager Configuration File 

ACT! User Logon Tracking 

Color Quick Label 

Cadence Ambit BuildGates 

.ALI SAP Proprietary Format Document File 

OM2 OMALI Native OMALI Document 

.ALIAS Alias Image [XnView] 

.ALL Arts & Letters Symbols and Characters 

WordPerfect Printer Info 

Steinberg Cubase or VST Song File 

Always Working Page Format File 

.ALS Alias Image [XnView] 

Calmira Shortcut File 

.ALT WordPerfect Menu File 

ReliaSoft ALTA 6 (Accelerated Life Testing Analysis Software) 

.ALV Photoshop Levels 

Aladdin Knowledge Systems Vbox Available Languages File (software distribution) 

.ALX OM2 OMALI Plug-in Extension 

.ALZ ALZip Compressed File (Korean site) 

Game File (Dark Eden and others) 

.AM Applix SHELF Macro 

Advantage Database Server File 

Music File 

.AM2 AutoPlay Menu Studio Version 2 

.AM3 AutoPlay Menu Studio Version 3 

.AMB Radiance Ambient File Format 

.AMC Ant Movie Catalog 

.AMF Advanced Module Format Music File 

DSMIA/Asylum Module Music 

.AMG AMGC Compressed Archive (alternate site) 

AMG ACTOR System Image 

.AMI Cocreate SolidDesigner Annotation File 

Amiga Paint [XnView] 

.AML AutoMage (Automation/Macro Software) 

.AMM AMM File (pattern design pgm for Universal flat knitting machines) 

.AMP Photoshop Arbitrary Map Settings 

.AMR Adaptive Multi-Rate Codec (Phone sounds) [Player] 

.AMS Extreme's Tracker Module Format 

Photoshop Monitor Setup 

Velvet Studio Module 

.AMZ The Amazon Trail Saved Game 

.AN Groundworks Text File 

.AN8 Anim8or 3D Animation 

.ANC Canon Computer Pattern Maker File

.ANF AcuteNotes File (contains one or several notes order in a hierarchy) 

.ANI Animated Cursor Microangelo [IrfanView] 

.ANL Project Analyzer Saved Analysis 

.ANM DeluxPaint Animation 

.ANN Help Annotation 

.ANO Annotation File (often used with annotating PDF files) 

.ANS ANSI Graphic [ANSI] 

MS Word Text and Layout [Buy Office XP at Shop.Microsoft] 

.ANSR AnswerTool File 

.ANT SimAnt for Windows Saved Game File 

.ANV AirNav [XnView] 

.AOB DVD Audio File (MPEG-2 program streams with additional info) 

.AOF Acorn Object Format (used for data storage) 

.AOS Nokia Add-on Software 

.AOT ZenWorks Application Binary Object Template File 

.AP Applix Presents File 

Datalex EntryPoint 90 Data File 

WHAP-Compressed Amiga Archive 

.APA AlfaPad Organizer File 

ArcPad 6 Applet 

.APC Lotus Printer Driver Characters 

Centura Team Developer Compiled Application File 

.APD Lotus Printer Driver 

Centura Team Developer Dynamic Application Library File 

.APE Music Format [Many different players] 

.APF Lotus Printer Driver Fonts 

ArcPad 5 Profile 

Acrobat Profile File 

Homesite Project File 

Fax2000 File 

.API Lotus Printer Driver Info 

Photoshop Ink Colors Setup 

Application Program Interface 

Acrobat Plug-in 

1st Reader Passed Parameter File 

.APIN Adobe InDesign Import/Export Filter 

.APJ Angel Debug Monitor Project File (link is PDF file) 

Music Screen Saver File (usually associated with .SCR file) 

ARM Project Manager File 

.APK GameSpy Arcade Service 

.APL Centura Team Developer Application Library File 

ArcPad 6 Layer 

APL Workspace File 

.APM ArcPad 6 File 

.APO Apollo Scripts 

.APP R:Base, Symphony, DR-DOS, FoxPro (or other) Application 

Centura Team Developer Normal Mode Application File 

dBASE Application Object File 

ArcPad 5 Project 

SymbianOS Application 

CLARION for Windows Application 

Executable Application (under DR-DOS, NeXTstep, Atari) 

.APR Lotus Approach 97 File 

ArcView Project File (GIS-related file) 

Employee Appraiser Performance Review File 

.APS MS Visual C++ File 

ArcPad 5 Symbology File 

Advanced Patching Systems with Error Checking 

.APT Centura Team Developer Text Mode Application File 

Lotus Approach Data View File

Nimbus 7 SAMS Data File (a-priori temperature profiles) 

.APX Lotus Approach Paradox-specific Information File 

Borland C++ Appexpert Database 

ArcPad 6 XML File 

Ability Photopaint Image [XnView] 

.AQ Applix Data 

.AQ1 AptiQuiz Test 

.AQA AptiQuiz Result 

.AR Compressed Archive File (used by MS Midtown Madness 1 & 2 games) 

Midtown Madness City Add-on 

.ARA ATI Radeon Video Driver File 

.ARC Archive File 

.ARCHIMEDES Speccy Snapshot 

.ARF Automatic Response File 

.ARH ArHymo Hydrologic Simulation () 

.ARI Aristotle Audio File 

Compressed Archive 

.ARJ Compressed Archive (Stuffit can expand) 

.ARK Compressed Archive 

.ARL AOL Organizer File [AOL] 

.ARM Armadillo Software Protection System 

.ARN Astronomical Research Network [XnView] 

.ARPX8 Techno Toys Arp-X8 MIDI Arpeggiator File 

.ARQ Compressed Archive (often on a Macintosh) 

.ARR Atari Cubase Arrangement 

.ARS Artifax Report Editor (SQL query tool) 

.ART Clip Art File 

Xara Studio Drawing 

Blood Archive [Dragon UnPACKer] 

Duke Nukem 3D Archive [Dragon UnPACKer] 

Canon Crayola Art File 

Another Ray Tracer Format 

AOL Johnson-Grace Compressed File [AOL] 

First Publisher Raster Graphic 

PFS: Art Publisher [XnView] 

Art Director Image [XnView] 

Artisan [XnView] 

Bernina Artista (sewing design) 

.ARV Arsiv File 

AutoRoute User Information 

.ARX Compressed Archive 

.ARY Compaq SmartStart Scripting Toolkit File 

.AS Applix Spreadsheet 

Macromedia Flash Action Script (include files when writing large scripts) 

.AS3 Alternate Sources Data File [Warning: Link goes to a sexually-oriented site.] 

APL*PLUS II/386 and III/Windows Source Code 

.AS4 AS/400 Client Access 

.ASA MS Visual InterDev File 

Active Server Document 

.ASC ASCII Text File [ASCII] 

PGP Armored Encrypted File [PGP] 

.ASCX Web User Control (part of MS .NET) 

.ASD MS Word Automatic Backup [Buy Office XP at Shop.Microsoft] 

Lotus Screen Driver 

MS Advanced Streaming Format Description File 

Astound Presentation 

.ASE Velvet Studio Sample 

.ASF MS Active Streaming (Media) File (contains audio and/or video compressed with 3rd party codecs) 

Statgraphics Data 

Lotus Screen Font

APL*Plus/PC APL Shared File 

Electronic Arts Music File 

.ASH TASM Assembler Header 

.ASI Borland Assembler Include 

.ASK askSam Database 

.ASM Assembler Source Language (various) 

Pro/Engineer Assembly File 

.ASMX ASP.NET Webservices Source File 

.ASO Assembler Object 

Astound Dynamite Objects 

.ASP Active Server Page 

Procomm Plus ASPECT Program 

Astound Presentation File 

Photoshop Photo File Index 

Photoshop Separation Setup 

EROSION 3D Aspect File [Format (pdf)] 

.ASPI Audio Catalyst 

.ASPX ASP.NET Source File 

.ASR Ms Automap Route 

Photoshop Scratch Area 

.ASS Assembler/Disassembler 68HC11 File 

ASS I/O (programmers utility to pack multiple files into one file) 

.AST Astound Multimedia File 

Photoshop Separation Tables 

Claris Works Assistant File 

.ASV DataCAD Autosave File 

Photoshop Selective Color 

.ASX Metafile (points to an .ASF structured file) 

Cheyenne Backup Script 

Video File 

.AT2 Aldus Persuasion 2.0 Auto Template 

DCX-AT200 Motion Control Command Language File 

.AT3 DCX-AT3000 Motion Control Command Language File 

.ATF Photoshop Transfer Function 

.ATK Bitmap Image (Andrew Toolkit Raster Object file) [XnView] 

.ATL Hal/Supernova/Lunar/LunarPlus Screen Readers/Magnifiers 

PROGNOSIS Atlas Document File 

.ATM Adobe Type Manager Data File 

.ATN Adobe Photoshop Action File 

.ATO Just Burn File (audio CD burner on Compaq computers) 

.ATR Lightscape Material Library 

.ATS Attityd Swedish Survey Program 

.ATT AT&T Group 4 Bitmap (fax) [XnView] 

.ATW AnyTime Deluxe PIM File [PIM] 

Attityd Swedish Survey Program 

.ATX A ZIP-formatted Compressed Archive (Use any ZIP program to open) 

.AU Music File (various, usually Sun or UNIX) [IrfanView] [Linux Player] 

.AUD Audio File used by Westwood Studios for various games 

.AUP ePocrates File 

.AUT AutoIt Script (automate any windows based task) 

PocketWear Car Lease Kit Vehicle Data File (Pocket PC) 

TLG Workplace CD Search File 

Xitami Webserver Admin Password File (default.aut) 

GPSMan-autoMapic File (moving-map real-time plotting) 

Signwave Auto-Illustrator File 

Descent Manager Mission File 

Authentication File (various) 

Interactive Pictures iPIX Format 

.AUX TeX/LaTeX Auxilliary Reference File 

ChiWriter Auxilliary Dictionary File

.AV Final Draft AV Document File 

.AVA Avagio Publication 

.AVB Inoculan Anti-Virus Virus Infected File 

Avid Bins File 

Microsoft Chat Character File 

.AVC Kaspersky Antivirus Toolkit File 

.AVD Avery Label Pro Data File 

.AVI Audio Video Interleave File [IrfanView] 

.AVL ArcView Theme Legend File (GIS-related file) 

.AVP ArcView Pallet File (GIS-related file) 

Avid Project File 

.AVR Audio Visual Research Sound File 

.AVS Animation File 

Application Visualization System Format 

Stardent AVS X Image [XnView] 

Winamp Advanced Visualization Studio File 

Avid Settings File 

.AVX ArcView File (GIS-related file) 

Avid Extensions File 

.AW HP AdvanceWrite Text File 

MS Answer Wizard File 

Applix Word File 

.AWB Lavasoft Ad-aware Backup File 

.AWD Faxviewer Document (AWD Microsoft Fax) [PolyView Viewer] 

Award BIOS File 

AWK Language Source Code File 

.AWE Adobe Acrobat Bookmark XML File 

.AWF Qui veut gagner des millions Archive [Dragon UnPACKer] 

Who wants to be a millionaire Archive [Dragon UnPACKer] 

.AWK AWK Script 

.AWM Animation Works Movie 

.AWR Telsis Digital Audio File 

.AWS StatGraphics Data File 

.AWX MS DirectX 8.1 

.AX DirectShow Filter 

DivX MPEG-4 DVD Filter [some filters work with Windows Media Player] 

.AXD Avery Label Pro Re-Index File 

Autodesk Actrix Technical 2000 File 

.AXE Paradigm C++ Integrated Debugger File 

ChordMaster (Chord Chemistry and Sequencing program for guitarists) 

MS Autoroute Export File 

.AXG MS Autoroute Trip File 

.AXL ArcIMS XML Project File [XML] 

.AXP GraphStore eCADLite File 

.AXR Telsis Digital Audio File 

ElcomSoft Advanced Archive Password Recovery 

.AXS MindAvenue AXEL Stream File 

.AXT ZenWorks snAPPshot ASCII Application Object Template 

Photoshop Replace Color/Color Range 

.AY AY Chip Sound File (chip used in ZX spectrum and other arcade machines) 

.AZ WinDVD File 

.AZZ AZZ Cardfile Personal Information Manager 

BBBBBBBBBBBBBBBBBBBBBBBB http://pulsar.sitemynet.com 

.B Limbo Implementation File (Inferno OS)

Brainf*ck Program (small programming language) 

Befunge Program 

Grand Theft Auto 3 Save File 

Applause Batch List 

.B02 ADP Payroll (unverified) 

.B16 PCO Graphic [XnView] 

.B1J BookJones 

.B1N 1st Reader Binary Screen Image 

.B1S BookSmith 

.B30 Ventura Publisher Printer Font 

.B3D 3D Builder File 

BDE Multipath Movie Digital Viewer 

.B4 Helix Nuts and Bolts File (Helix Software now part of McAfee) 

.B5S Numerical Controlled Machine File (Ball-bar?) 

.B64 Base 64 MIME-encoded File [MIME] 

.B8 Piclab Raw Graphic File 

.B&W Atari Black and White Graphics 

1st Reader Mono Binary Screen Image 

Image Lab [XnView] 

.B_W Atari/Macintosh Black and White Graphic 

1st Reader Mono Binary Screen Image 

Image Lab [XnView] 

.BAC Backup 

.BAD Rime Mailer Address File 

Oracle BAD File 

Brutus Application Definition File (password cracking) 

.BAG PMMail Mail Index File 

OS/2 Netfinity Manager Sysinfo File (adapter.bag) 

AOL Instant Messenger File 

Emperor: Battle for Dune Archive [Dragon UnPACKer] 

.BAK Backup 

.BAL Ballade Music Score 

.BAN Sierra Print Artist Banner 

.BAR dBase Application Generator Horizontal Menu Object 

.BAS BASIC Language Source 

Basic Module 

.BAT Batch Processing (DOS Batch File) 

.BAV The Bat! E-mail Client Anti-Virus File 

.BB Papyrus Database Backup 

Blitz Basic File 

Starfleet Battles DOS Game 

.BB2 XBBS-OS/2, XGROUP, AV and ZTree Archiver Control File 

.BBC BBC BASIC File 

.BBL TeX/BibTeX Bibliographic Reference File 

.BBM Deluxe Paint Image File 

.BBMA Bonzibuddy 

.BBP BitBeamer Split File (of the form .??_??.bbp) 

.BBQ BitBeamer Transfer Queue File 

.BBS Bulletin Board Sytem Text 

.BC Sierra Print Artist Business Card 

.BC3 Fiebdc-3 Format File (Format of Interchange ESTANDAR of Data bases of CONSTRUCTION) 

.BCC Calendar Creator 8 Collection 

.BCF ConfigSafe Snapshot Index 

The Sims (Maxis) 3D Body Mesh File 

.BCH dBase Application Generator Batch Process Object 

Datalex EntryPoint 90 Data File 

Phoenix Software (Datalex) Entry Point 90 Data File 

.BCK Backup 

.BCM MS Works Communications File 

.BCN Business Card Pro Design

.BCO Bitstream Fontware File 

.BCP Borland C++ Makefile 

.BCW Borland C++ 4.5 Environment Settings 

.BDB MS Works Dababase File 

.BDE Borland Database Engine (embedded in many different programs) 

.BDF West Point Bridge Designer File 

.BDF Egret Data File 

X11 Bitmap Distribution Format 

Backup To CD-RW Backup Definition File 

.BDG Badge Designer 2000 Photo ID 

.BDR MS Publisher Border [Buy Office XP at Shop.Microsoft] 

.BEC Break Even Calculator 

.BED InfoSnorkel Blue Elephant Definition (define content InfoSnorkel extracts from web page) 

.BEZ Bitstream Fontware File 

.BF Brainf*ck Program (small programming language) 

Befunge Program 

.BF2 Bradford 2 Font 

.BFA Blowfish-encrypted File (Extension added to original) [Program List] 

.BFC Briefcase File 

.BFF AIX® Backup File Format 

.BFFM B17 Flying Fortress Game File (link is to support page) 

.BFL Colin McRae Rally 2 Data File 

BFLI [XnView] 

.BFLI BFLI [XnView] 

.BFM UNIX Font Metrics File 

.BFX BitFax Document 

BFX Bitware [XnView] 

.BG MS Backgammon for Windows Game 

.BGA OS/2 Graphic Array [XnView] 

.BGB MS Chat Background Graphic 

.BGI Borland Graphic Interface 

.BGL Flight Simulator Scenery File 

.BGM Jane's Combat Simulations F-15 

.BH BlackHole Archive Format File [ZipTV] 

.BHF pcAnywhere Host File 

.BHTML BabuHTML Embedded Software File (example use: netMailshar) 

.BHX Archive File 

.BI Binary File 

Progress Database Before Image File 

.BIB Bibliography 

Papyrus Database 

TeX/BibTeX Literature Database 

.BIC Civilization III Scenario 

.BID BidMaker 2002 File (software to aid in making bids on jobs) 

.BIE JBIG File [XnView] 

.BIF GroupWise Initialization File 

Image Capture Board Binary Black & White Image 

Baldur's Gate Archive [Dragon UnPACKer] 

Planescape: Torment Archive [Dragon UnPACKer] 

.BIG Chinese (old version) 

Cartes Michelin [XnView] 

.BIK BioCharter Profile Backup File 

Bink Game Video File 

.BIN Binary File (many) 

.BIO BioCharter Profile File 

OS/2 Bios File 

.BIT Bitmap Image 

Worms Armageddon Imported Map 

Worms World Party Imported Map 

.BIU BidMaker 2002 Update File (software to aid in making bids on jobs)

.BIX Index to a .BIB BibTeX Bibliography Database 

BIX Archiver File (no longer produced) 

.BIZ Broderbund Print Shop Business Card File 

.BJF NTI Backup NOW! File 

.BK Backup 

LinguAssist File 

JetFax Faxbook File 

.BK! Backup 

.BK$ Backup 

.BK? Backup (Can be 1 to 9, usually with WordPerfect) 

.BK1 Bach Preludes and Fugues MIDI akmi Source, Book 1 

.BK2 Bach Preludes and Fugues MIDI akmi Source, Book 2 

.BKC Collectorz.com Book Collector Database 

.BKF Moto Racer Archive [Dragon UnPACKer] 

MS WindowsXP Backup Utility (Note: This is default; can be renamed to any extension.) 

.BKG Background File (used in many games/programs) 

UWXAFS Binary Format Data File (absorption data on an energy grid which does not need to be evenly 

spaced) 

.BKI Backup Index 

.BKP Backup 

.BKR Bruker Aspect NMR Data File 

.BKS Bookshelf Backup 

IBM BookManager Read Bookshelf 

MS Works Spreadsheet Backup 

.BKU Timeslips Backup 

.BKW FontEdit Fontset Mirror Image 

.BLA Blat E-mail (command line E-mail tool written for Windows) 

.BLB DreamWorks Resource Archive 

.BLD BASIC Bload Graphics 

MegaPaint [XnView] 

VersaPro Block Build Info 

.BLEND Blender 3D File 

.BLG Windows Binary Performance Log 

(W-2000 & W-XP have different formats. To convert click.) 

.BLK WordPerfect Temp File 

Lightscape Block Library 

Alias Wavefront Image 

Amiga IFF [XnView] 

VersaPro Block 

.BLL An extension used by the VBS/European-A worm. If found in the directory 

C:\STARTUP suspect you are infected with this worm and have your computer 

checked with anti-virus software! 

INPRISE Format Language Library (changed to .BTL) 

.BLT Wordperfect for DOS File 

Saved AIM Buddy List File 

.BLZ Bitmap Graphic 

Twinkle Bulbs Bulb File 

Emblaze.Creator File 

Blazon Heraldic Shield 

Serial Number File [IBM's Drive Fitness Test (DFT) program] 

.BM Bitmap Graphic 

.BM1 Apogee BioMenace Data File 

.BMF Corel Flow Image File [XnView] 

.BMI Buzz Instrument 

Blue Martini Import File (eCRM) 

.BMK Help Bookmark 

.BML Bean Scripting Framework (BSF) File (Open with ASCII editor) 

.BMP Windows OS/2 Bitmap Graphics [IrfanView] 

.BMS Backup Magic Backup Set 

.BMU Music/Sound File [Open with Winamp or other MP3 player]

.BMW Buzz Music File with Waves 

.BMX Buzz Music File 

Siemens Mobile Phone Animation 

.BMZ Demon Stalkers: Raid on Doomfane (old game) 

.BN AdLib Instrument Bank 

.BNG [Used by program RANGER.EXE] (Marshalling Yard Calculations) 

.BNK Adlib Instrument Bank 

SimCity Game File 

(reported to be) Bink Compressed Video/Audio File 

.BNR Binary News Reader File 

.BNSKIN Beatnik Clock Skin 

.BOB BobDown Downloading Program [Also see Antibob] 

Bob Raytracer [XnView] 

.BOL MS Booasm Compressed Archive Library 

.BOM Orcad Schematic Capture Bill of Materials File 

Softshare Delta Business Object Model 

.BOO Image File 

Book 

Compressed Archive File 

.BOS Brotherhood of Steel Compressed File (renamed ZIP file; use any extractor) 

.BOT Frogbot Editor (Frog = Quake add-on computer opponent) 

.BOW Back Orifice 2K Workspace [this is a hacking tool] 

.BOX Notes Mailbox 

Lemmings Revolution Archive [Dragon UnPACKer] 

ThrottleBox Multimedia Viewer 

Aladdin Knowledge Systems Vbox Helper Application File (software distribution) 

.BOXR Boxerjam Interactive Game System 

.BPC Business Plan Toolkit Chart 

BuildPro File 

.BPL Delphi Library 

.BPP MUSICMATCH Burner Plus Project 

.BPR Borland C++ Builder 6 Project 

BackupXpressPro Project File 

.BPS MS Works Document 

Bulletproof FTP Settings 

.BPT Bitmap Master File 

.BPX Truevision Targa Bitmap [XnView] 

.BQY BrioQuery File 

.BR Bridge Script 

The Playa File (link is tentative) 

.BR3 Bryce 3D Scene File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by 

Corel) 

.BR4 Bryce 4 File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by Corel) 

.BRC Bryce 2 Scene File (Bryce made by MetaCreations, changed to Viewpoint, product taken over by Corel) 

.BRD EAGLE Board File 

.BRI Basic Rate Interface File 

.BRK Brooktrout Fax-Mail File [XnView] 

.BRO Tree Professional Broadleaf Creator File 

.BRP Tree Professional Broadleaf Creator Image 

.BRS Corel Paint Classic File 

.BRT Brooktrout Fax-Mail File [XnView] 

.BRU Brutus Restore File (password cracking) 

.BRW Application file associated with financial institution(s) loan applications 

.BRX Multimedia Browsing Index 

.BRZ DbBRZ File (Backup or Restore) 

.BS Printfox/Pagefox [XnView] 

.BS_ MS Bookshelf Find Menu Shell Extension 

.BS1 Apogee Blake Stone Data File 

.BS2 Basic Stamp 2 Code File (WordPad or BS2-Editor) 

.BSA BSARC Compressed Archive

.BSB SWAT Sub-basin Output File (river basin scale model) 

MapInfo Sea Chart 

.BSC Apple II Compressed Archive 

Source Browser Database 

Fortran Pwbrmake Object [FORTRAN] 

Boyan Script 

MS Developer Studio Browser File 

.BSK Bryce 4 File 

.BSP Quake Map 

Half-life/TFC/CS Map 

.BSQ Oracle Control File (SQL.BSQ) 

Apple II BINSCII-encoded File (often produces a Shrinkit .SHK file) 

.BST BibTeX Style File 

.BSU Brindys BriTray (software update) 

.BSV BASIC Bsave Graphics 

.BTAB Base Guitar Tabulature [On-line Guitar Archive] 

.BTF Brother Scanner File (supports multiple graphic pages in one file) 

.BTL INPRISE Format Language Library (changed from .BLL) 

.BTM 4DOS Batch To Memory Batch File 

.BTN ButtonWare File 

JustButtons Animated Bitmap [XnView] 

.BTO Baytex Organix! 2001 Language Kit 

.BTR Btrieve Database File 

MS Frontpage-related File [Buy Office XP at Shop.Microsoft] 

.BTS Creative Digital Blaster Digital VCR File 

.BUD Quicken Backup 

.BUF WinXL File (Datascope emulation software) 

.BUG Bug (Problem) File 

.BUL Holiday Lights Screen Saver Bulb File 

.BUM Poser Bump [XnView] 

.BUN CakeWalk Audio Bundle File 

.BUP Backup DVD Info File 

PC-Bibliothek Update File 

CD Indexer 

Brother Embroidery System File 

Softcode Tracker Contact Manager Backup (Australian software no longer sold) 

.BUT Buttons! Button Definition 

.BUY Movie Data File 

.BV? WordPerfect Overflow File (Can be 1 to 9) 

.BVH Biovision Motion File [Format] (Used by Poser and other software) 

.BVS BVS Solitaire Collection 

.BW SGI Black and White Image 

Silicon Graphics Raw RGB File [XnView] 

.BWB Visual Baler Spreadsheet File 

.BWI Blindread/Blindwrite 

.BWR Kermit Beware Bug List 

.BWS Blindread/Blindwrite 

.BWT Blindread/Blindwrite [Fantom CD Emulator] 

CDmage Table of Contents 

.BWV Business Wave File 

.BXF Man's Best Friend Software Breeder Exchange Format 

.BXX blaxxun Contact 

.BYU Movie File (Shockwave) 

.BZ Bzip UNIX Compressed File (Open using WinRAR 

.BZ2 Bzip UNIX Compressed File (Replaces .BZ) (Open using WinRAR 

.BZF Textures and Other Information (used by various games) 

CCCCCCCCCCCCCCCCCCC http://pulsar.sitemynet.com

.C C Program File 

[Note: Some UNIX compilers use .c (lower case) for C and .C (upper case) for C++] 

Check Point Site Configuration for Secure Remote 

UNIX Compact File Achive 

Desktop Color Separation Specification Cyan Layer (usually an EPS file) 

.C?? Winace Compressed File (open with WinRAR) 

.C++ C++ Source Code 

.C-- Sphinx C-- Source 

.C00 Ventura Print File 

.C01 Typhoon Wave File (unverified - may just be one of a string of compressed files [see .C??]) 

.C08 Lord Of Destruction Game File (unverified - may just be one of a string of compressed files [see .C??]) 

.C2D IsoBuster File 

WinOnCd CD Image 

.C3D Chem3D Chemical File 

.C3T Chem3D Chemical Template File 

.C4 JEDMICS (Joint Engineering Data Management) DoD Engineering Data Format [For-pay Viewer] 

Edmics [XnView] 

.C4D Cinema 4D (3D Modeling texturing and animation program) 

.C6 Ashlar-Vellum File 

.C86 C86 C Program 

.C-- Sphinx C-- Source code 

.CA Telnet Server Initial Cache Data File 

DATAIR FlexPlus Data File 

.CA1 OzWin CompuServe E-mail/Forum Access Catalog File 

STABCAL (stability calculation for aqueous systems) File 

.CA2 STABCAL (stability calculation for aqueous systems) File 

.CA4 Electronics Workbench Circuit 


.CA7 Beta 44 Job File 


.CAB Cabinet File (Microsoft installation archive) 

Install Shield v5.x or 6.x Compressed File (not comp atible with MS .CAB files) 

.CAC dBase IV Executable File 

.CAD Softdesk Drafix CAD File 

.CAF Southern Company Terrestrial Data Acq 

.CAG MS Clip Gallery Catalog File 

.CAL SuperCalc Worksheet 

Calendar File 

HTML Calendar Maker Pro 

DOS Calendar Creator File 

Cals Raster File [SwiftView] 

Radiance Function File Format 

CALS Raster [XnView] 

.CALS CALS Raster [XnView] 

.CAM Casio Camera Graphic [XnView] [IrfanView] 

Camtasia Project/Producer Files (screen recording editor) 

.CAN Canon Navigator Fax [XnView] 

.CAP Ventura Caption 

Network Associates Sniffer Capture File 

Telix Session Capture 

Compressed Music File 

.CAPS Visimetrics Digital CCTV Recording (series of JPEG images) 

.CAR AtHome Assistant File 

Carrara Environment 

NeoBook Cartoon [XnView] 

Viper Racing Car Description File 

.CAS Comma-delimited ASCII File 

i2's Case Notebook Timeline Analysis

Casio Program 

Cascade DTP File (desktop publishing for browsers using CSS technology) 

.CAT dBase Catalog 

Quicken IntelliCharge Categorization File 

Cognos Impromptu Database Report 

OzWin CompuServe E-mail/Forum Access Catalog File 

Photomatrix PhotoStudio Graphic [XnView] 

.CAZ Computer Associates Archive 

.CB MS Clean Boot File 

Crystal Button File 

Brief Macro Source Code 

.CBC CubiCalc Fuzzy Logic System File 

.CBH ChessBase Chess Database File 

.CBI IBM Mainframe Column Binary Formatted File 

.CBL COBOL Program 

Contextual Browsing Language Viewer (usually JavaApplet) 

.CBM XLib Compiled Bitmap 

Fuzzy Bitmap [XnView] 

.CBS Cardbox Macro Script (database program) 

.CBT Computer Based Training 

.CBW Cardbox Workspace (database program) 

.CC C++ Program File 

Visual dBASE Custom Class File 

dB2K Custom Class File 

Picture Window's Color Curve File (ASCII text file) 

.CC1 Chem3D Cartesian Coordinates 1 

Briggs Softworks Calendar Commander 

.CC2 Chem3D Cartesian Coordinates 2 

.CC5 Calendar Creator 5.x 6.x File 

.CCA CC:Mail Archive File 

Multimedia Fusion File (multimedia game creation - Clik N Create, The Games Factory can open some) 

.CCB Visual Basic Animated Button Configuration 

.CCC Chat 

Curtain Call Native Bitmap Graphic 

.CCD CloneCd Related File [Fantom CD Emulator] 

Vector CAD Program File 

.CCE Calendar Creator 2 Event File 

.CCF OS/2 Multimedia Viewer Configuration File 

Symphony Communications Configuration File 

Remote Control File (various to include: ProtoProEdit, RAVedit) 

AudioReQuest Control File 

Hallmark Card Studio File 

.CCH Corel Chart 

Fabasoft Components 

.CCL Intalk Communication Command Language 

.CCM Lotus CC:Mail Mailbox 

.CCN Vitalize! Game File [Played via IE plug-in] 

.CCO CyberChat Data File 

XBTX BTX Graphics File 

.CCP C Converter Profiles (construction site management) 

.CCR Chat Room Shortcut 

.CCS CONKY CeZaR Stribas International 

.CCT Macromedia Director Shockwave Cast 

Logic Works Schematic File 

SIL Hebrew Font System Transliteration Table 

.CCX Corel Compressed Exchange File 

.CD cdTree Content List 

.CD1 DATAIR Cafeteria Document System Data File 

.CD2 DATAIR Cafeteria Document System Custom Text File 

.CDA CD Audio Track

.CDB Turbo C Database 

Clipboard File 

One Page from a ROM With a View Project File 

CardScan Database 

Nokia 9210/9290 Contact Database (Nokia runs Symbian) 

SymbianOS Contact Database File 

PowerDesigner Conceptual Model Backup File 

.CDC Chromeleon Driver Configuration Plugin 

Nero File (CD burning/design software) 

.CDD Chromeleon Device Driver 

Claris Draw v 1.2 Document 

.CDE Honeywell Hybrid Control Designer (HC900-x Industrial Controllers) 

.CDF Comma Delimited Format 

Cyberspace Description Format 

MS Channel Definition Format 

InstallShield Components Definition File 

NetCDF Graphic File 

.CDG DART Karaoke Studio CD+G File (contain only song lyrics and synchronization data) 

.CDI Phillips Compact Disk Interactive Format 

Disc Juggler File (CD-ROM data) 

.CDJ Disc Juggler File (CD-ROM data) 

.CDK Atari Calamus Document 

.CDKEY Protocol Used in Communicating from MediaRemote Server to PC MediaRemote Plug-in (ASCII 

text) 

.CDL CaseWare Working Papers Document Link 

SignLab Vector Graphic 

.CDM PowerDesigner Conceptual Model File 

Visual dBASE Custom Data Module 

Compressed Music Format (unverified) 

.CDP CD/Spectrum Pro 

.CDR Corel Vector Graphic Drawing [XnView] 

Raw Audio-CD Data 

Sound File [Linux Player] 

.CDS ChemDraw Stationery Document 

.CDT Corel Draw Template 


.CDU CDU Paint [XnView] 

.CDX Compound Index [File Structure] 

Corel Draw Compressed Drawing 

MS Visual Foxpro Index 

Active Server Document 

ChemDraw Chemical Structure 

Microstation Cell Library Index 

.CDXL Old Amiga Movie Format 

.CDXML ChemDraw XML ChemDraw Format 

.CDZ ROM With a View Project File 

.CE FarSide Computer Calendar File 

Computer Eyes, Digital Vision [XnView] 

.CE1 Computer Eyes, Raw [XnView] 

.CE2 Computer Eyes, Raw [XnView] 

.CE3 Calendar Creator 3.x 4.x Event List 

.CEG Continuous Edge Graphic 

Tempra Show Bitmap Graphic 

.CEL Autodesk Animator Graphic 

CIMFast Event Language File 

Kiss Paper Doll File 

Microstation Cell Library 

Kiss Cel [XnView] 

Lumena CEL [XnView] 

.CEM Empire Earth Game File

.CEN Master Tracker Financial Analysis 

.CER Certificate File 

Sierra Print Artist Certificate 

.CEV Software License Tracking Tool (CERTAUTH.CEV) 

LOUT Character Encoding File (High-Level Language For Document Formatting) 

.CEX The Currency Exchanger Rate File 

INMOS Transputer Development System Occam User Program 

ThumbsPlus File (Progressive Multi-image JPEG file) 

.CF Imake Configuration File 

.CF4 Catfish File Manager Support File 

.CFB Comptons Multimedia File 

.CFC Cold Fusion File 

.CFF Capabilities File for FOUNDATION(tm) Fieldbus H1 (31.25 kbit/s) 

.CFG Configuration (various) 

.CFH Capabilities File for FOUNDATION(tm) Fieldbus HSE (100 Mbit/s) 

.CFL Corel Flowchart File 

.CFM Corel FontMaster 

Cold Fusion Template File 

Visual dBASE Windows Customer Form 

.CFN Atari Calamus Font Data File 

.CFO TCU Turbo C Utilities C Form Object 

.CFP Complete Fax Portable Fax File 

.CFR IBM Configurator Report (if you don't have the program ask the sender to exp ort to .RTF for you) 

.CFW ChemFinder Form 

.CFX Flow-Cal File (natural gas measurement) 

.CGA Ventura CGA Screen Characters 

.CGI Common Gateway Interface Script 

.CGM Computer Graphics Metafile 

.CGP NetCaptor CaptorGroup 

.CH Clipper Header 

OS/2 Configuration File 

.CH3 Harvard Chart (Harvard Graphics taken over by Serif) 

.CH4 Charisma 4.0 Presentation 

.CHA Adobe Pagemaker Kerning Data 

.CHAT PIRCH98 Chat File 

.CHD FontChameleon Font Descriptor 

ChartFX File 

.CHF pcAnywhere Remote Control File 

.CHI Chiwriter Document 

Help File Index (typically used when the Help file will stay on a CD-ROM -- .CHI speeds access to the 

info) 

.CHJ Help Composer Project 

.CHK CHKDSK/SCANDISK Output 

WordPerfect Temp File 

Sophos Intercheck File 

.CHL Chromeleon Channel Raw Data 

Configuration History Log 

.CHM Compiled HTML Help 

ChemDraw Chemical Structure (old format) 

.CHN Ethnograph Data File 

.CHP Ventura Publisher Chapter 

.CHQ Help Combined Full-text Search File (produced when multiple .CHM files are merged) 

.CHR Character or Font File 

.CHS Corel WP Chart Style 

ATI Radeon Video Driver File 

.CHT Cheat Machine Data File 

ChartViewer dBase Interface File 

Harvard Graphics Vector File (Harvard Graphics taken over by Serif) 

ChartFX Template File 

ZSNES Cheat Code (Super Nintendo emulator)

.CI CitectSCADA File 

.CIF Ventura Chapter Information 

CalTech Intermediate Graphic 

Easy CD Creator Image 

pcAnywhere Caller File 

Ventura Converted Image File 

Colombo Ipermedia File 

Chip Layout Information 

Crystallographic Information File 

.CIL Clip Gallery Download Package 

.CIM Sim City 200 File 

CompuApps Drive Backup Image 

CIMEX Cimpack Design Drawing File 

.CIN OS/2 Change Control File 

Cinetitler Digital Screen Subtitling 

Kodak Cineon [XnView] 

.CIP Ghost Keylogger File 

.CIR SuperMax E-CAD Save-File Command 

PSpice File 

Flash Color Table 

.CIS CheckInbox File 

.CIT Intergraph Scanned Image [XnView] 

.CIX TCU Turbo C Utilities Database Index 

.CK1 iD/Apogee Commander Keen 1 Data File (.CK1 to .CK6) 

.CKB Borland C++ Keyboard Mapping File 

.CKD CADKEY GraphX File Format (ver 2 and above) 

.CKP Ingres Checkpoint File 

.CKT Crocodile Clips (Electronic design/physics) 

.CL Generic LISP Source Code 

.CL3 Easy CD Creator Layout File 

Bruker Aspect NMR Data File 



.CLA Java Class File (usually .CLASS but can be shortened) 

CLARION for DOS 

.CLASS Java Class File 

.CLB ICQ Contact List 

MS Office XP Developer Code Librarian 

cdrLabel Compact Disc Label 

.CLF ListPro File 

.CLG Disk Catalog Database 

Maxagrid CTM Log File (text format) 

.CLK Corel R.A.V.E. Animation File 

.CLL Crick Software Clicker File 

OzWin CompuServe E-mail/Forum Access Custom Library Search 

.CLO Cloe Ray-Tracer [XnView] 

.CLOE Cloe Ray-Tracer [XnView] 

.CLP Windows Clipboard/Picture [IrfanView] 

Quattro Pro Clip Art 

CLIPS/wxCILPS File (C Language Integrated Production System) 

Clipper 5 Compiler Script 

PC Paint/Pictor Page [XnView] 

GoDot [XnView] 

.CLR WinEdit Colorization Word List 

1st Reader Binary Color Screen Image 

PhotStyler Color Definition 

FileMaker Spelling Dictionary 

.CLS Visual Basic Class Module 

C++ Class Definition 

.CLV Aladdin Knowledge Systems Vbox Current Language File (software distribution)

.CLW Microsoft Visual C++ Class Wizard File 

CLARION Database (DOS & Windows) [CLARION Magazine] 

.CLX Macro ToolsWorks Macro 

.CM Craftman Data File 

.CM2 Curious Labs Poser Camera File 

.CM4 ClipMate Data File 

.CMA Applix TM1 Database File (text) 

.CMB Chromeleon Backup Archive 

.CMC PowerFront File (part of ShopMind) 

.CMD OS/2, WinNT Command File 

DOS CP/M Command File 

dBase II Program File 

1st Reader External Command Menu 

.CMF Creative Music File 

Corel Metafile 

.CMG Chessmaster Saved Game 

.CMK Card Shop Plus File 

.CML Cheat Machine Library File (Windows) 

PADGen Company Info File 

.CMM CEnvi (ScriptEase:Desktop) Batch File 

.CMO Virtools Behavioral Server Composition 

.CMP Leadview Bitmap 

Discorp CMP Image [XnView] 

Open Access File 

Address Document 

JPEG Bitmap 

CorelDRAW Postscript Printer Header 

Route 66 Address Document 

MS Word for DOS User Dictionary 

.CMQ Culturemetrics (Personality Profile Analyser) 

.CMR MediaPlayer Movie 

CribMaster File (Toolcrib inventory management) 

.CMT Culturemetrics (Personality Profile Analyser) 

Chinon ES-1000 Digital Camera [XnView] 

.CMU Carnegie Mellon Univeristy Stereo Raster Image 

CMU Window Manager [XnView] 

.CMV Corel Move Animation 

.CMW MS Custom Maintenance Wizard File 

COM-Watch (data analyser) 

.CMX Corel PhotoPaint Image [XnView] 

Corel Presentation Exchange Image [XnView] 

The Sims (Maxis) 3D Body Mesh Data 

Apple Viewer File 

.CNC CNC General Program Data 

Click 'n Create File 

.CND ControlDraw File 

Embroidery Design File [possibly read with Melco Sizer Software] 

.CNF Configuration (various) 

SpeedDial 

.CNM Windows Application Menu Options and Setup File 

.CNQ Compuworks Design Shop File 

.CNREG EULANDA® Warenwirtschaft (ERP) Configuration Information 

.CNREP EULANDA® ERP System Report Template 

.CNS W2K Client Connection Manager Export File 

.CNT Help File Contents (and other contents needs) 

.CNV MS Word Data Conversion File 

WS_FTP Pro Upload Conversion File Data 

WordPerfect Temporary File 

Canvas versions 6, 7, 8 

.CO Cult3D ActiveX Player Application

.COB COBOL Program File 

Caligari Truespace Format 

TrueSpace2 Object 

.COD Code List 

Compiler Program Code 

.COD Multiplan Data File 

dBase Template Source File 

SWAT Input Control File (river basin scale model) 

FORTRAN Compiled Code [FORTRAN] 

Video Text File 

.COK Carmageddon Patch File 

.COL Autodesk Color Palette 

Multiplan Spreadsheet 

Lotus Notes Import Column Description File 

.COM Command (Executable file) 

.COMPAT Likely a text file (e.g., README.COMPAT) 

.CON Knowledgeware Consolidation File 

Tree Professional Conifer Creator File 

Simdir Configuration File 

.CONF IRC Related Configuration File (IRCDs or EggDrops) 

Linux Configuration File (also UNIX) 

.CONFIG MS .NET Application Configuration Information 

.COO Fabasoft Components 

.COP Tree Professional Conifer Creator Image File 

.COR Protein Structure File 

Web GPS Correction Server Export File 

WMOVIEC Input File 

.COS Scarlett Expert System Compiler Query File (Scarlett is not presently available) 

.COV Fax Cover Page (Win2000 Cover Page Editor) 

.CP CompuMedic Database (medical billing software) 

.CP8 CP8 256 Gray Scale Image [XnView] 

.CPA Colasoft Capsa (network sniffer) 

.CPD Fax Coversheet 

Corel PrintOffice File 

Complaints Desk Script 

.CPE Fax Coversheet 

.CPF Complete Fax File 

.CPG 3dize® Cool Page File 

.CPH Corel Print House Image 

.CPI Code Page Information 

ColorLab Image 

Calamus [XnView] 

.CPJ CeQuadrant CD Project 

Commotion File (compositing software tool) 

.CPL Control Panel Extension 

Corel Color Palette 

Comp el Presentation 

.CPM Cisco Secure Policy Manager File 

.CPN Age of Empires II Campaign File 

.CPO Corel Print House File 

.CPP Borland C++ Builder 6 

CA-Cricket Presents Presentation 

Maya File 

.CPR Corel Presents Presentation 

Knowledge Access Graphics 

INMOS Transputer Development System Occam Program Code Fold 

.CPS Antivirus Checksum File 

Central Point PC Tools Backup 

Colored PostScript File 

Classroom Performance System File

.CPT Macintosh Compressed File 

Corel Photo-Paint Image [XnView] [IrfanView] 

Jasc After Shot (Image Expert 2000 taken over by Jasc from SierraImaging) 

dBase Encrypted Memo 

CA Cricket Presents Template 

.CPT6 Corel Photo-Paint Image [IrfanView] 

.CPX Control Panel Applet 

Code Page Translation File 

CryptaPix Encrypted Image 

Corel Presentation Exchange Compressed Drawing 

.CPY Copy Books Data File 

Atari Ramdrive CPY Commands 

Flexus COBOL Definitions (function, element and value properties associated with a control) 

.CPZ COMPOZ Music Text 

.CR CRiSP Source Code 

Crack File (produced by several key generator programs) 

.CR2 Curious Labs Poser Character File 

.CR4 STABCAL (stability calculation for aqueous systems) File 

.CR7 STABCAL (stability calculation for aqueous systems) File 

.CRA Personal Craft Factory File (no longer supported--GraphicCorp bought by Corel) 

.CRD Cardfile (Windows 3.x Database) 

Guitar Chord File [On-line Guitar Archive] (Usually an ASCII text file) 

.CRF Zortech C++ Cross-Reference File 

Database Cross-Reference File 

OM2Cipher Recipient File 

Sierra Print Artist Craft 

System Shock 2 Archive [Dragon UnPACKer] 

Thief 2: The Metal Age Archive [Dragon UnPACKer] 

Thief: The Dark Project Archive [Dragon UnPACKer] 

.CRG Calamus [XnView] 

.CRH MS Golf Image File 

Links Games Course File 

.CRK Crack File (differences between original and cracked files) [Need proper version of CRK.EXE to open] 

.CRL Certificate Revocation List 

.CRM Capital Research Vendor Bid System 

.CRP dBase Encrypted Database 

Visual dBASE Custom Report 

Corel Presents Run-Time Presentation 

.CRS WordPerfect 5.1 for Windows File Conversion Resource 

Links Games Course File 

Gold Game Course File 

.CRT Certificate File 

Oracle Terminal Settings Info 

UNIX Crontab File (not a required extension for Crontab) 

.CRU CRUSH Compressed Archive 

.CRW Canon Raw Format (Image) [XnView] [ACDSee 4.0] 

.CRX Links Games Course File 

.CRY Crypto Chat II Encrypted Notebook-content 

.CRZ Links Games Course File 

.CS C#.NET Source File 

.CSA Comma Deliminated Text 

Ultimate Ride Roller Coaster 

.CSB Corel Photo-Paint Script 

CircuitSoft Viewer (a module of EMSI Complete) - (Unverified) 

.CSC Corel Script 

.CSD Bitstream Fontware File 

Chemsoft® MSDS Database File 


.CSF Van Dyke's CRT/SecureCRT Script File

GeoMedia Coordinate System File 

.CSG Statistica Graph File 

.CSH Hamilton Labs C Shell Script File 

.CSI Cyberautograph Signed Item 

.CSK Claris Works 

.CSM Borland C++ Symbol File 

Borland C++ 4.5 Precompiled Header 

Kodak DC265 Camera Script 

.CSN Dreamweaver MX's Snippet 

.CSP PC Emcee On-Screen Image 

CaseWare Working Papers Script Page 

.CSQ Foxpro Queries 

.CSS Hypertext Cascading Style Sheet 

Stats+ Datafile 

Statistica Datasheet 

.CST Macromedia Director Cast File 

.CSV Comma-Separated Variables 

CompuShow Adjusted EGA/VGA Palette 

.CT Scitex CT Handshake Bitmap [XnView] 

Iris CT Graphic [XnView] 

.CT0 Maxagrid CTM File Being Processed (text format) 

.CT1 Maxagrid CTM File Successfully Processed (text format) 

.CT2 Maxagrid CTM File Unsuccessfully Processed (text format) 

.CTB NoteTab Clipbar 

.CTC PC Installer Control 

.CTD Cobra Track Dump (COmBined Reconstruction for Atlas) 

Cardtable File (text file) 

Marine Data File (e.g., automatic float data) 

Simpsons Cartoon Studio Export File 

.CTF TIFF Compressed File 

WhereIsIt Catalog 

Symphony Character Code Translation 

MGI PhotoSuite 1.0/8.0 Album File 

Calculator Text Format 

.CTG Cartridge Definition File 

ChessBase Opening Book 

Canon Powershot Pro 70 Info File 

.CTL Setup Information (various) 

User Control (various) 

.CTM FreeBSD Content Management File 

Java Charge Transaction Matrix File 

Crazytalk Talking Animation File 

Maxagrid CTM File (text format) 

SDR99 Speech Recognition Task Time Marked Conversation Input 

Content Delivery Service (Web site pending as of Feb 2002) 

.CTP American Greetings Greeting Cards 

ChemDraw Template 

.CTT Hotmail List of E-mail Contacts 

LabView File 

.CTX Compressed Text 

Visual Basic User Control Binary File 

Pretty Good Privacy (PGP) Ciphertext File 

MS Online Course Text 

MS Windows Terminal Server INI Backup File 

Chinese Character Input File 

.CTY SimCity City File 

.CUB OLAP Cube File (definition for SQL Server, any OLE DB, or ODBC-compliant database) 

.CUE MS Cue Cards Data 

Description File for a CD-Image [Fireburner.com or Goldenhawk.com] or [Fantom CD Emulator]

.CUF Turbo C Utilities Form Definition 

.CUL IconForge/ImageForge Cursor Library 

.CUP OzWin CompuServe E-mail/Forum Access Catalog Library Update 

.CUR Cursor Microangelo [IrfanView] 

.CURSOR Sun Icon/Cursor [XnView] 

.CURXPTHEME Cursor XP File (changes look & function of mouse cursor) 

.CUT Dr. Halo Bitmap Graphic [XnView] 

INMOS Transputer Development System Occam Utility Package 

Utilitaires (multiple utilities) 

DataWave Physiological Data File 

.CV Corel Versions Archive 

MS CodeView Information 

.CV4 Codeview Colors 

.CV5 Canvas version 5 

.CVA Compaq Diagnostics 

.CVG Image File 

.CVP WinFax Cover Page 

Portrait [XnView] 

.CVR WinFax Cover Sheet 

ElectraSoft Fax Cover Sheet 

.CVS Canvas Drawing File 

Outlook Express File 


.CVT dBase Converted Database 

.CVW Codeview Colors 

.CW3 Crossword Construction Kit Puzzle Group 

Claris Works Win 3 Document (now Filemaker) 

Chem Draw Molecular Structure (Lewis structures, orbitals and lab apparatuses) 

.CWB WebNote Document 

.CWD StarDraft CWAD File (StarCraft Editor) 

.CWE Crossword Express 

.CWK Claris Works Data also see AppleWorks 

.CWP Cakewalk SONAR Audio Project 

.CWS Claris Works Template also see AppleWorks 

.CWW Crossword Weaver File 

.CXE Common XML Envelope 

.CXT Macromedia Director Protected Cast File 

Vegas Jackpot Gold Game Data File 

.CXX Zortech C++ Program 

.CYN Cynex Root55 Program Extension 

.CYP Cypherus Encrypted Archive 

DDDDDDDDDDDDDDDDDDDDDDD http://pulsar.sitemynet.com 

.D Dialect Source Code File 

D Programming Language Source Code File 

.D_1 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library) 

.D_3 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library) 

.D$W MindStor Driver (digital wallet) 

.D00 Ganbatte! Winamp Plug-in 

.D01 Ganbatte! Winamp Plug-in 

Note: .D00 and .D01 formats created by Jens-Christian Huus 

of the Vibrants and contains OPL2 music data. 

.D11 Macro Mania Data File 

.D2D 3D Fassade Plus 2D/3D Object File 

.D2I Shadowmaster Diablo II LOD Character Editor File 

.D2S Diablo II Character and Equipment File 

.D2V DVD Ripper File 

.D3D CorelDream 3D File 

Direct3D File

.D3F MS MechCommander 2 Encyclopedia 

.D64 Commodore 64 Emulator Disk Image 

.D8A AmBiz Productivity Pak Catalog 

.DAD Chromeleon Channel Raw Data 

.DAF OM2 911 Xchange Version 3 & 6 Document 

.DAN ATI Radeon Video Driver File 

.DAO Windows Registry Backup 

IsoBuster File 

.DAP Omnis5 Application File 

MS Access Data Access Page [Buy Office XP at Shop.Microsoft] 

.DARBY TheWord & Bible Companion Darby's Bible Translation Bible 

.DAT Data (multiple programs) 

Note: RDXR020305.DAT is Morpheus adware. Kill this and others with Ad-aware. 

WordPerfect Merge Data 

(also possibly) MPEG File 

VCD and/or SVCD File [Help Site] (play with Media Player) 

Mitsubishi DJ-1000 and Photorun Native Format 

Gunlok Archive [Dragon UnPACKer] 

Nascar Racing Archive [Dragon UnPACKer] 

SPOT Graphic [XnView] 

SHARP MZ-series Emulator RAM-Disk File 

.DAWN Experimental File Format (.DAWN) 

.DAZ Poser 3D File 

.DB Paradox Database 

Progress Database 

Solid Database 

WindowsXP Thumbnail Database 

ANSYS Database 

SmartWare Office Pac File (requires login) 

Oracle Database 

.DB$ dBASE Temporary File 

Clarion Modula-2 Debug Info 

.DB2 dBase II File 

.DB3 dBASE III File 

.DBA DataEase Data File 

DarkBASIC File 

.DBB ANSYS Database Backup 

Mopheus Music File 

.DBC MS Visual Foxpro Database Container 

PROGNOSIS Database Collection Document File 

.DBD Clarion Modula-2 Debug Info 

Business Insight Data 

Oracle Record Type 

.DBF Database (multiple programs) [started as dBASE] [File Structure] 

Oracle 8.x Tablespace File 

ArcView Shape File (GIS-related file) 

.DBG MS C++ Symbolic Debugging Info 

Oracle Generator File 

.DBI Photo Soap2 File 

.DBK dBase Database Backup 

Orcad Schematic Capture Backup File 

.DBL WindowsXP Product Activation File (if on WPA.DBL in the System32 folder) 

.DBM Cold Fusion Template 

DataBoss Menu Template 

DataEase Data File 

OzWin CompuServe E-mail/Forum Access SYSOP File 

.DBO dBase IV Compiled Program File 

.DBOOK Pocket Diary Text 

.DBQ Paradox Memo 

.DBR Comdial VMMI Database

.DBS SQL Format Database 

Word Printer Description File 

.DBT Database Text File [dBASE] [File Structure] 

Oracle Template 

Foxbase Memo 

.DBV Flexfile Memo Field File 

.DBW DataBoss Database File 

.DBX Database (multiple programs) 

DataBeam Image 

MS Visual Foxpro Table 

.DC DesignCAD CAD File 

.DC2 DesignCAD CAD File 

Kodak DC25 Digital Camera File 

DC2-PC Motion Control Command Language File 

.DC5 DataCAD Drawing File 

.DCA Visual Basic Active Designer Cache 

IBM DisplayWrite Document Content Architecture Text File 

D-PAS Portfolio Manager File [Education about D-PAS] 

.DCB Concordance Database Control Block 

.DCD Document Content Description File 

FORTRAN Data File [FORTRAN] 

INMOS Transputer Development System Occam Object Code 

.DCF Design Rule for Camera File Systems File 

DynSite Configuration File 

Dyadic Data File 

Disk Image File 

.DCL DumpSec 

DesignComposer Addition to Layout Knowledge Base 

.DCLST DC and DC++ Direct Connect [File sharing network using DC++] 

.DCM DCM Module Format 

Dicom [XnView] 

.DCP Delphi Compiled Packages 

OS/2 Data CodePage 

.DCR Shockwave File 

Kodak Proprietary Image Format 

.DCS Quark Desktop Color Separation Specification 

ACT! Activity Data File 

.DCT Dictionary (various) 

MS Visual Foxpro Database Container 

.DCU Delphi Compiled Unit 

.DCV DriveCrypt Volume 

.DCW Draft Choice for Windows 

.DCX FAX Image [IrfanView] 

ElectraSoft Fax 

PC-Paintbrush File [SwiftView] 

Bitmap Graphics [IrfanView] 

Macros 

MS Visual Foxpro Database Container 

.DD Macintosh Compressed Disk Doubler Archive 

C64 Doodle [XnView] 

.DDB Device-Dependent Bitmap Graphics File 

Design Database File (database definition file) [MS Access???] 

INMOS Transputer Development System Occam Debugging Info 

Protel 99SE Design Database File 

.DDATA Pocket Diary Text File 

.DDE Dynamic Data Exchange 

.DDF BTRIEVE Data Dictionary File (allows other programs to access data) 

Bitstream Fontware File 

Doom Definition File 

Music Library File

Grand Theft Auto 3 File [GTA3 Forum] 

.DDI DiskDupe Image 

Disk Doubler Image 

.DDL MS Data Definition Language File (SQL Server Query Analyzer) 

.DDM Intelliware Data Modeller (Data Mapping and Aliasing) 

.DDP OS/2 Device Driver Profile File 

Delphi 6 File 

.DDS INMOS Transputer Development System Occam Compiler Descriptor 

Photoshop Compressed Textures 

.DDT Neurological Data for Statistical Analysis [File Format & More Info] 

.DDX Juno "Get" File 

Device Data Exchange Format File (text CAD design exchange format) 

.DDW CSPro File (combined IMPS and ISSA Census Processing System) 

.DE MetaProducts Download Express Incompletely Downloaded File 

.DEB DOS Debug Script 

Debian Linux Package 

.DEC VersaPro Declaration File 

.DESK Card Deck File 

.DESKLINK MS Windows Explorer Desktop Controls 

.DEF Definitions 

Defaults 

SGML Tag Definition 

Modula-2 Definition Module File 

SmartWare II Data File 

C++ Definition 

3D Fassade Plus Define Module File 

Geoworks Assembly Header File 

.DEI Gerber Design Engineered Interface 

.DEL Data 

.DEM Descent Demonstration 

USGS Map 

Digital Elevation Model File (GIS-related file) 

Half-life Game File 

.DEP Setup Wizard Dependency 

.DEPLOY DeployMaster Setup Script 

.DER Certificate File 

.DES Description Text 

Tribes 2 Game File 

Quickbooks Template 

Pro/DESKTOP File 

Interscope BlackBox File (encryption program) 

.DEU ATI Radeon Video Driver File 

.DEV Device Driver 

Device Independent TeX 

LaTeX File 

.DEX WinGlucofacts File (diabetes management software) 

.DEZ DES Encrypted Zip File 

.DF Lightscape Parameters 

.DF1 Omnis7 and Omnis Studio Database File (also .DF2, .DF3, etc.) 

.DFA Amateur Strip Poker Data File (NOTE: Site opens with barely-clad ladies) 

.DFC Voicemail File (Trio Voice Communications and maybe others) 

.DFD File Flow Diagram Graphic 

.DFF Digital Animation Format 

Grand Theft Auto 3 Export Format [Model Editing] 

.DFI Digifont Outline Font Description 

.DFL Signature Default Program Settings 

.DFM Borland C++ Builder 6 Form 

Borland Delphi Form 

File Flow Diagram Model 

.DFP Stabilogram Diffusion Analysis File (Requires MatLab)

Digital Fusion Plug-in 

.DFS Delight Sound File 

.DFT Fakt2000 File 

SolidEdge CAD File 

Workshare Synergy File 

PC Draft File 

.DFV Word Print Format Template [Buy Office XP at Shop.Microsoft] 

GYYR DVMS Digital CCTV Recording 

.DG Autotrol Graphics 

.DGC TurboTax-related File 

.DGK Delcam Powershape/Powermill (3D CAD) 

.DGN Microstation CAD Drawing File 

Intergraph Graphics 

Dragon 32 Emulator 

.DGO Dimitrius Settings File (Dimitrius is program author) 

.DGR Fax Page (MS Outlook Express) 

DART Pro 98 File Group Details 

Keeptool ER Diagrammer 

.DGS AT Advanced Diagnostics File 

.DH Geoworks Dependency Information File 

.DHE MS Help Workshop Dialog Box Help Editor Document 

.DHP Dr. Halo PIC 

.DHT Gauss Data File 

.DIA Computer Support Corp Diagraph Graphics File 

DIA Drawing 

.DIB Device-Independent Bitmap Graphic [IrfanView] 

.DIC Dictionary (various) 

.DIF Data Interchange Format 

DIFF Command Output (patch script) 

.DIG Text Document 

Digilink Format 

Sound Designer Audio File 

.DIL DesignComposer Input DIL Script 

.DIN DataEase File 

ADC Labs eWave File (broadcast automation software) 

.DIP Graphics File 

.DIR Procomm Plus Dialing Directory 

Macromedia Director File 

DEC VAX Directory 

Worms Armageddon Archive [Dragon UnPACKer] 

.DIS DKB Ray Tracer File [XnView] 

DATAIR Data Import Specification Layout File 

VAX Mail Distribution File 

Corel Draw Thesaurus 

.DISCO MS .NET Web Service Discovery File 

.DIT MS Win2000 Active Directory Schema 

.DIVX Movie Encoded with DivX-codec 

.DIZ Description In Zip File 

.DJE MattBatt iAM-player 

.DJV DjVu File [XnView] 

.DJVU DjVu File [XnView] 

.DKB DKBTrace Ray-Traced Graphics File 

.DL Animation File (this appears to be associated with glifomon.zip, a probable porno file) 

Masked .DLL File (often used by malware to hide .DLL files from virus scanners [e.g., Sub7]) 

.DL_ Compressed .DLL File in an Install Archive 

.DL4 Lindab Dimsilencer File 

.DLC Echelon HQ Configuration File 

Model Dislocation File 

3D Studio Max Animation Controller File (Character Studio) 

.DLD Lotus File

.DLE Macromedia Designer 3D Translator File (Also 3D Studio Max) 

.DLF Belkin Router Firmware Update 

.DLG Dialog Resource Script 

C++ Dialogue Script 

Infinity Engine Game Dialog File 

Digital Line Graph (U.S. Geological Survey geographic database) 

.DLK INMOS Transputer Development System Occam Compiler Link Info 

.DLL Dynamic Link Library 

CorelDraw Export/Import Filter 

.DLM Dirty Little Helper Cheat File 

Dynamic Link Module 

ASCII Delimited File (sometimes used in voting systems) 

3D Studio Max Character Studio 

.DLS Downloadable Sounds (Interactive Music Architecture) 

Norton DiskLock Setup File 

ADAPTA DLS/32 Supply Chain Planning (ASCII file with general number data) 

dataLive Database Engine File 

.DLU Dirty Little Helper Update File 

.DM2 Quake 2 Demo File [Viewer] 

.DM3 Quake 3 Arena Demo File [Viewer] 

.DM_48 Quake 3 Arena Demo File [Viewer] 

.DM_57 Return to Castle Wolfenstein Demo File [Download site] 

.DM_59 Return to Castle Wolfenstein Demo File [Download site] 



.DMC Medical Manager DML System Compiled Script 

.DMD Visual dBASE Data Module 

dB2K/dQuery Web DataModule 

OS/2 Warp Device Manager Driver 

.DME Medical Manager DML System Data Merge 

.DMF Delusion/XTracker Digital Music File 

Packed Amiga Disk Image 

.DMG Macintosh OS X Disk Image File (Treated like a real disk) 

.DMK Digimask File (3D human faces) 

.DML Darn! Shopping! Mall File 

Medical Manager DML System Script 

.DMO Derive Demo 

.DMP Dump (various) 

INMOS Transputer Development System Occam Core Dump 

.DMS Amiga DISKMASHER Compressed Archive (see ADF) [Amiga Forever] 

.DMT Delcam Machining Triangles (3D CAD) 

.DMX Medical Manager DML System Index for Custom .DME Files 

ProTrader Database 

.DN8 Blue Martini UTF-8 Encoded DNA File (eCRM) 

.DNA Blue Martini DNA File (eCRM) 

.DNA.XML Blue Martini XDNA File (eCRM) 

.DNC Machine Tool Communications 

.DND ClustaW Tree File 

.DNE Darn v5+ (Windows) Events List 

Netica Bayes Net File 

.DNG Dungeon File (created by ID software) 

.DNI realMyst 3D Archive [Dragon UnPACKer] 

.DNL DigitalWebBook Electronic Book (requires installation of DigitalWebBook plug-in) 

netMod Modem Firmware Upgrade File 

.DNS DynSite Plug-in File 

.DO Stata Batch Analysis File 

DigitalOutrage Hosting Control Panel Info 

.DOB User Document Form File 

.DOC Document or Documentation (many programs/formats) 

MS Word Document [Buy Office XP at Shop.Microsoft]

DisplayWrite 4 File 

.DOCHTML MS Word HTML Document [Buy Office XP at Shop.Microsoft] 

.DOCMHTML MS Word HTML Document [Buy Office XP at Shop.Microsoft] 

.DOF Racer 3D Geometry File 

.DOG Laughing Dog Screen Saver 

.DOH Geoworks Dependency Information File 

.DOL D-PAS Portfolio Manager Flexible Benchmarking Analysis File [Education about D-PAS] 

.DOO Atari Doodle [XnView] 

.DOP Digital Orchestrator File 

.DOQ Digital Orthophoto Quadrangle (digital aerial photo) 

.DOQQ Digital Orthophoto Quarter Quadrangle (smaller digital aerial photo) 

.DOS Text File/DOS Specification Info 

1st Reader External Command File 

Network Driver File 

.DOT MS Word Document Template [Buy Office XP at Shop.Microsoft] 

Corel Lines-Definition 

.DOTHTML MS Word HTML Document Template [Buy Office XP at Shop.Microsoft] 

.DOX Text File 

MultiMate Document 

User Document Binary Form File 

.DOZ VENDINFO Description Out of Zip File 

.DP Daily Planner Calendar File 

DataPhile Data File 

.DPA Serif DrawPlus Animation 

.DPC DiscPlay Collection File 

Delphi Package Collection File 

OrCad Design Rule Check Output 

.DPD OmniServer File (OPC/DDE Server) 

.DPJ DeskProto CAM Project File 

.DPK Delphi Package File 

.DPL Borland Delphi 3 Packed Library 

Digital Photo Librarian Database 

.DPP Serif DrawPlus Drawing 

.DPR Borland C++ (or Delphi) Default Project 

.DPS DivX XP Skin (.ZIP file format) 

DPS Reality Video Editing File 

.DPT Publish-It! Publication File 

.DPX Digital Moving Picture Exchange [XnView] 

.DPY Realpolitik Saved Game 

PROGNOSIS Display Document File 

.DQA itaz doQument File 

.DQB D-PAS Portfolio Manager File [Education about D-PAS] 

.DQD itaz Default doQument Database 

.DQY MS Excel ODBC Query File [Buy Office XP at Shop.Microsoft] 

.DR9 Directory File 

.DRC Orcad Schematic Capture Design Rules Check Report File 

DriveCrypt Container File (Note: This extension was changed to .DCV due to a WinXP conflict.) 

Borland Delphi Compiled Resource File 

.DRES Diagnosis Results 

.DRJ Deraj Data File 

.DRL DocObject Resource Locator 

.DRM Steinberg Cubase Drum File 

.DRN Darn for DOS 

.DRS WordPerfect Driver Resource 

Age of Empires 2 Archive [Dragon UnPACKer] 

.DRV Device Driver 

.DRW Drawing (various) 

Micrografx Vector Graphic 

Pro/E Drawing 

.DRX Adobe Photoshop Tutorial

.DRZ Draz Paint [XnView] 

.DS Chemisty Software 

PhotoMax Drive 

HP Officejet T Series All-in-One TWAIN File 

.DS4 Micrografx Designer Graphics (ver 4) 

.DSA DasyTec DASYLab File 

.DSB DasyTec DASYLab File 

.DSC Oracle Discard File 

Nikon Coolpix Disk Identification File 

dpkg-source (info needed help unpack Debian source archives) 

.DSCE Diagnosis Scenario 

.DSD DataShaper Database File 

Document Structure Definition File 

.DSES Diagnosis Session 

.DSF Micrografx Designer 

PC-TRUST Document Signer (Extension means file is signed) 

Delusion/XTracker Digital Sample 

Vicon Kollector 2.0 CCTV Recording (likely a wavelet format) 

.DSG Doom Saved Game 

.DSH Dashboard PDA Wallpaper 

.DSI Digital Sound Module Tracker Format (unverified) 

R-Studio Hard Disk Scan Results File 

.DSK Borland C++ or Turbo Pascal Project Desktop File 

Novell Driver File 

Lotus Notes Design Elements 

SHARP MZ-series Emulator File 

.DSL Lingvo User Feature Dictionary 

.DSM Delphi Symbol File 

Digital Sound Module Tracker Format 

Dynamic Studio Music Module 

.DSN ODBC Data Source 

SureThing Office Labeler (formerly DesignExpress) Document 

Object System Designer Design 

Orcad Schematic Capture Schematic File 

.DSO Tribes 2 Compiled Script 

.DSP Signature Display Parameters 

Dr. Halo Graphic Screen Driver 

MS Developer Studio Project 

.DSQ Corel QUERY File 

DASYLab Worksheet Sequence 

.DSR WordPerfect Driver 

Active Designer File 

.DSRES MS Dungeon Siege Texture File 

.DSS Digital Soup Digital Sound File 

DCC Active Designer File 

Digital Speech Standard File (Voice Recorders & IBM's ViaVoice) 

.DSST ConsumerPoint File (CACR Marketing) 

.DST PC-RDist Distribution File 

Embroidery Machine Stitch File (VeePro) [possibly read with Melco Sizer Software] 

.DSW MS Developer Studio Workspace 

Borland C++ Desktop Settings 

.DSX Active Designer Binary File 

.DSY PC Draft Symbol Library 

.DSZ Embroidery Machine Stitch File (VeePro) 

.DT_ Macintosh Data File Fork 

.DT5 Brother's Keeper File (genealogy software) 

.DTA Data (Various) 

Stata Binary Saved Datasets 

Hidden & Dangerous Archive [Dragon UnPACKer] 

.DTB DesignTools PCB Design and Make (printed circuit design - common in UK schools)

.DTD SGML Document Definition File 

DesignTools 2D Design (vector drawing - common in UK schools) 

.DTEA Diagnosis Template Archive 

.DTF Q&A Database 

MS Exchange Header File (Used when sending to Lotus Notes) 

.DTL Hal/Supernova/Lunar/LunarPlus Screen Readers/Magnifiers 

.DTM DigiTrekker Module 

Softshare Delta Translation Map 

.DTP SecurDesk! Desktop 

Timeworks Publisher Text Document 

Publish-It! Publication 

Pressworks Template File 

.DTQ Database Tools Query 

.DTS Digital Surround Audio File Format 

MS Data Transformation Services (Data Transformation Packages used by MS SQL Server) 

.DTX LaTeX Source and Documentation Archive 

E-Book File 

DocuTech Print6 Engine File (Prints DocuTech Closing Documents) 

LithTech Model Texture File 

.DUN Dial-Up Network 

.DUP Duplicate Backup 

.DUS Readiris Font Dictionary 

.DV DESQview Script 

Digital Video File 

.DVB Visual Basic for Applications Macro Project 

.DVC Lotus File 

.DVF DV Studio Camcorder Graphics File 

.DVI TeX Device Independent Document 

.DVP DESQview Program Information 

AutoCAD Device Parameter 

.DVR Device Driver 

.DW2 DesignCAD Drawing File 

.DWC Compressed Archive 

.DWD DiamondWare Digitized File 

Davka Writer File (Hebrew editor) 

.DWF Autodesk WHIP! Drawing Web File 

MS WHIP autoCAD REader Drawing Web File 

.DWG AutoCAD Drawing Database 

Drafix Drawing 

.DWI Dance With Intensity (dance simulator) 

.DWK Locked DWG File 

.DWN Cisco Download File (usually a system update) 

Firmware Update File (several) 

Experimental File Format (.DAWN) 

.DWP Dweep Game Levels 

DeScribe Document File 

.DWS Dyadic Workspace File 

AutoCAD Standartization File 

.DWT AutoCAD Template/Prototype File 

Macromedia Dreamweaver Template File 

Demon's World Game Texture File 

.DWY Dwyco Video Clip 

.DX Document Imaging File 

Digital Electric Corporation (DEC) Data Exchange File 

Deus Ex File 

.DXB Drawing Interchange Binary 

.DXF AutoCAD Drawing Interchange Format 

.DXL Dapyx MP3 Explorer (MP3 database organizer) 

DOORS Extension Language 

.DXMAX Oozic File

.DXN Fujitsu dexNet Fax Document 

.DXPACK DesktopX Object (customizes the Windows Desktop) 

.DXR Vegas Jackpot Gold Game File 

.DXTHEME DesktopX Theme File (customizes the Windows Desktop) 

.DXR Macromedia Director Protected Movie File 

Dependable Strengths Administrator Resources (Macintosh) 

Green Building Advisor File 

.DYN Lotus File 

.DZ Dzip Compressed File 

EEEEEEEEEEEEEEEEEEEEEE http://pulsar.sitemynet.com 

.E Specman Testbench E-program Source File 

.E00 ArcInfo Coverage Export File (GIS-related text file) 

.E01 Encase Forensic Software 

.E2 thinkdesign CAD Design 

.E3 thinkdesign CAD Design 

.E48 Emu48 HP48 Emulator File 

.E78 IBM 3270 Terminal Emulator Screen Layout Definition 

.EAC EmEditor Auto Completion File 

.EAF Aframe File (suite of generic testing and assessment software) 

MicroEmacs Abbreviation File Format 

FRAGSTATS*ARC File (Landscape Structure/Spatial Pattern Analysis for ARC/INFO) 

.EAL Enfocus Action List 

.EAR Java Enterprise Application Packaging Unit 

.EAS Elite Visual Basic API Spy (Use care entering this site) 

.EAZ Express Assist File 

.EBF Pocket PC WindowsCE Form File 

EARS Definition Backup (EARS = UK Liberal Democrats Election Agents Record System) 

.EBJ Geoworks Error Checking Object File 

.EBK EARS Database Backup (EARS = UK Liberal Democrats Election Agents Record System) 

.EBO Microsoft Reader Ebook Format 

.EBP Pocket PC WindowsCE Project File 

.EBS WindowsXP Scanner File 

.EBX Electronic Book Exchange (Open Source) [Adobe reader] 

.ECA electroCAD File 

.ECC Ecchi Role-playing Format (Generally X-rated Anime File) [XnView] 

.ECF WinFax Office Add-in File 

MS Outlook Add-in File 

.ECO NetManage ECCO File [Alternate site] 

.ECR Ecrypt E-mail File 

.ECS Encrypted Compressed GIS Software Geographic Shape File [GIS info] 

(ArcView, et.al.) (JShape/FShape) 

.ECW Ensoniq Waveset Format 

EclipseCrossword Crossword Puzzle 

Enhanced Compressed Wavelet [XnView] 

.ECW2002PUZZLE EclipseCrossword Puzzle 

.ECW2002WORDS EclipseCrossword Word List 

.ED EasyDraw CAD File (Japanese CAD program) 

.ED5 EDMICS Graphics File 

.ED6 EDMICS Graphics File 

.EDA Ensoniq ASR Disk Image 

.EDB ROOTS3 Geneological Data 

.EDC Kryptel (light) Decoder/Encoder 

.EDD FrameMaker Element Definition Document 

.EDE Ensoniq EPS Disk Image 

.EDF Workshare Synergy Document Change Management 

.EDK Ensoniq KT Disk Image 

.EDL Edit Decision List (management for video and film post production) 

.EDM CAD Contouring Parameter Data File

Extinction Corrected Differential Photometry 

.EDML Dreamweaver MX Extension File 

.EDN EDIF Netlist File (Xilinx ISE FPGA Compiler) 

.EDP Attachmate Extra! Session 

.EDQ Ensoniq SQ1/SQ2/KS32 Disk Image 

.EDS Ensoniq SQ80 Disk Image 

.EDT VAX Edt Default Settings 

.EDV Ensoniq VFX-SD Disk Image 

.EEB WordPerfect Equation Editor Button Bar 

EaseBook File (Word add-on for writing books and articles in XML) 

.EES Empire Earth Scenario File [SCN Punk Site] 

.EFA Ensoniq ASR File 

.EFC EFCoins File 

.EFD EARS Filter Definition (EARS = UK Liberal Democrats Election Agents Record System) 

.EFDEMO Star Trek Voyager Elite Force Demo File [Viewer] 

.EFE Ensoniq EPS File 

.EFF IEEP TeamBG File (modify Infinity Engine games) 

EverQuest Effects File 

.EFK Ensoniq KT File 

.EFQ Ensoniq SQ1/SQ2/KS32 File 

.EFS Ensoniq SQ80 File 

.EFT Chiwriter High Res Screen Characters 

.EFV Ensoniq VFX-SD File 

.EFX eFax.com Fax Document (Used to be JetFax in 1999) 

.EGA Ventura EGA Screen Characters 

.EGD GIS Software Encrypted Grid Shape File [GIS info] 


.EGS GIS Software Encrypted Grid Shape File [GIS info] 


.EHTML Enhanced HTML 

.EI Electric Image [XnView] 


with E] 

.EID Faena MyID Encrypted File 

IBM ViaVoice Vocabulary File 

.EIDI Electric Image [XnView] 

.EK5 Simrad EK500 Scientific Echosounder Data [Use Echoview to analyze] 

.EK6 Simrad EK60 Scientific Echosounder Data [Use Echoview to analyze] 

.EKM EXP: The Scientific Word Processor Macro 

.EL eMacs Lisp Source Code 

.ELC eMacs Lisp Byte-compiled Source Code 

.ELD EARS Label Definition (EARS = UK Liberal Democrats Election Agents Record System) 

.ELETTERHEAD Electronic Letterhead 

.ELF Black Belt Systems Extended Layer File 

Tasklink for Windows Machine Control Executable and Linking Format 

.ELG EARS Log (EARS = UK Liberal Democrats Election Agents Record System) 

.ELI Encyclopedia Article List 

.ELL ATI Radeon Video Driver File 

.ELM MS FrontPage Theme-Pack File [Buy Office XP at Shop.Microsoft] 

.ELOG McAffee Firewall Log 

.ELT Event List Text 

.EM1 Emax I Bank File 

.EM2 Emax II Bank File 

.EMAIL Outlook Express Mail Message [Buy Office XP at Shop.Microsoft] 

(Rename to .EML to access in OE but beware of viruses and worms) 

.EMB Everest Embedded Bank File 

IEMBL Nucleotide Format (MIME type chemical/x-embl-dl-nucleotide) 

.EMBL IEMBL Nucleotide Format (MIME type chemical/x-embl-dl-nucleotide) 

.EMD ABT Extended Module 

.EMF Extended Windows Metafile Format [IrfanView]

.EML MS Outlook Express Electronic Mail [Buy Office XP at Shop.Microsoft] 

Note: .EML files with "funny" names in multiple folders implies the Nimda worm. 

QuickMail Pro 

.EMM EARS Mail Merge Definition (EARS = UK Liberal Democrats Election Agents Record System) 

.EMR Emrite (Wordprocessor file) 

.EMS PC Tools Enhanced Menu System Config 

YoshimuraEMS Motorcycle Fuel Injection 

.EMU Emulation 

.EMX Enigmacross Puzzle File (Develop professional acrostic puzzles) 

Emax System File 

.EMY Eericsson Ringtone 

.EMZ Windows Compressed Enhanced Metafile (MS graphic format for Office and Visio) 

.ENC UUENCODE Encoded File 

Video File 

BlackIce Evidence Log File 

Knowledgeware Encyclopedia 

Encore Music File 

Dungeon Related File (created by ID software - tied to .DNG file) 

.END Corel Arrow Definition 

.ENF RightClick-Encrypt File 

EndNote Filter File 

.ENG Dictionary 

Sprint Dictionary Engine File 

EnerGrahics Chart Graphics File 

.ENL Endnote Library File (for research papers) 

.ENR Enroute Toolath 

.ENS EndNote Styles File 

.ENT Entrust Entelligence Secured File 

.ENU ATI Radeon Video Driver File 

.ENV WordPerfect Environment 

WOPR Enveloper Macro 

Acrobat Spelling File 

Sierra Print Artist Envelope 

The Golem Project Environment File 

Motocross Madness 2 Track 

.ENW Sierra LandDesigner 3D Terrain Modeling 

.ENZ EndNote Connection File 

.EON EON Studio File (Interactive 3D authoring) 

.EOP EON Studio File (Interactive 3D authoring) 

.EOT MS WEFT Embedded OpenType File 

.EOX EON Studio File (Interactive 3D authoring) 

.EOZ EON Studio File (Interactive 3D authoring) 

.EP Bonas Jaquard EP Weave Format File 

.EP2 EclipsePackager Package 

.EPA Award BIOS Logo [XnView] 

.EPD Express Publisher Publication File 

EARS Printer Definition (EARS = UK Liberal Democrats Election Agents Record System) 

.EPE EON Studio Personal Edition File (Interactive 3D authoring) 

.EPI Express Publisher Document File 

EclipsePackager Invoice 

EPS Interchange Format [XnView] 

.EPL Tallyman E-commerce Software? 

.EPP EditPad Pro Project 

.EPR Eiffel Project Repository 

.EPS Encapsulated PostScript [XnView] [IrfanView] 

Ventura Printer Font 

.EPZ EON Studio Personal Edition File (Interactive 3D authoring) 

.EQL DART Pro 98 Fabric Equalization Presets 

.EQN WordPerfect Equation 

.EQT ReliaSoft Weibull++ 6 (Life Data Analysis Software)

.EQW SPEFO Stellar Spectra Analysis File 

.ER1 ERWin File 

.ERD Entity Relationship Diagram 

.ERI Entis Rasterized Image (ERI-chan) [XnView] 

.ERM Entity Relationship Diagram Model 

.ERP British Economics & Social Research Council Electronic Form 

.ERR Error Log (various - many associated with install programs) 

.ERS EARS Control File (EARS = UK Liberal Democrats Election Agents Record System) 

.ERX ERWin File 

.ES EasySIGN Drawing Sheet 

.ESF Emblaze Audio File 

.ESH Extended Shell Batch File 

.ESI Esri Plot File 

.ESL MS Visual FoxPro Distributable Support Library 

.ESM Enhanced Simplex [XnView] 

.ESP Ventura File 

ACD/CurveManager Analysis File 

Ethos System Analysis File 

ACD Analysis File (Advanced Chemistry Development) 

E$Planner File 

.ESR 4D Database Windows Procedure 

.ESS EXP: The Scientific Word Processor Style Sheet 

.EST MS Streets & Trips 2001 Trip File 

ICE 2000 File (Interactive Cost Estimating) 

.ESY EmEditor Syntax File 

.ET2 Electronic Tax Return Security File (Australian taxes) 

.ETA eTreppid Audio File (eTplayer & ETVC media CODEC) 

.ETB Seismograph File (compressed?) 

.ETC eTreppid Compressed File 

Seismograph File 

.ETH Ethnograph Document File 

.ETM eTreppid Audio File (eTplayer & ETVC media CODEC) 

.ETV eTreppid Audio File (eTplayer & ETVC media CODEC) 

.ETX SetText Structure Enhanced Text 

.EUC Japanese (Kanji) 

.EUI Ensoniq EPS Family Compacted Disk Image 

.EUK Euklides Dynamic Geometry 

.EUM Euklides Dynamic Geometry 

.EUS EDonkey2000 Serverlist Tool 

.EV EchoView File (sonar fishing data) 

EV8 File (Virtual Reality applications) 

.EV2 Java File 

.EV3 EVERLOCK Options File 

.EV6 EV8 File (Virtual Reality applications) 

.EVA Viz Modeler 3D Scene Archive (used for TV graphics) 

.EVB Embedded Visual Basic File (used on Pocket PCs) [Developer info] 

.EVC EchoView Color Scheme (Echocolor-created data) 

.EVI EchoView Index File (speed up processing of echosounder data) 

.EVK EVERLOCK File 

.EVL EchoView Line File (echosounder time/depth coordinates) 

.EVR EchoView Region File (echosounder time/depth coordinates) 

.EVT PC Tools Event File Scheduler 

MS WinNT/2000 Event Viewer Log File 

Cameo D1 Digital CCTV System Recording Event Log (JPEG files with associated *.LOG files) 

.EVY Envoy Document 

.EWB Electronics Workbench 

.EWD Express Publisher for Windows Document 

.EWL MS Encarta Document 

EclipseCrossword Word List 

.EWP QuickCog Project File

Evidence Washer Plug-In (erases your Internet tracks) 

.EWS QuickCog Sample Set File 

.EX EPM Macro File (software install) 

Euphoria File (Programming language) 

.EX2 PC Doctor File (HP computer - unverified) 

.EX3 Harvard Device Driver (Harvard Graphics taken over by Serif) 

.EX^ Norton Live Update File 

.EX_ Compressed .EXE File in an Install Archive 

.EXA Examine32 Saved Search Parameters (text search utility) 

.EXB Flash Image File 

.EXC QEMM Exclude File 

REXX Program 

MS Word Exclusion Dictionary [Buy Office XP at Shop.Microsoft] 

Text Document 

.EXD Control Information Cache 

.EXE Executable File 

Out-of-process Code Component Used by COM Clients (Component Object Model) 

Settlers IV Saved Game 

.EXF Fuji EXIF Format File (Any JPEG viewer should view) [File Format (PDF)] 

.EXM HP Calculator Executable 

.EXP ICQ Saved Chat File 


.EXT Norton Commander Extension File 

WS-FTP ASCII Binary Transfer File 

E-mail Text Attachment (unverified) 

Extinction Corrected Photometry 

.EXU Euphoria File (Programming language) 

.EXW Euphoria File (Programming language) 

.EXX IBM LinkWay MsgPut Intermediate File 

.EYB Encyclopedia Yearbook File 

.EYE Glass Eye File (stained glass window design) 

.EZC EZScreen Screen Saver Editor 

.EXF Calculus EZ-Fax Fax 

.EZM Text File (From some mailing lists) 

.EZP Edify Electronic Workforce Backup Utility 

.EZS Sunburst Technology Easy Sheet Document 

.EZT Sunburst Technology Easy Sheet Template 

.EZX WHAP File 

FFFFFFFFFFFFFFFFFFF http://pulsar.sitemynet.com 

.F Compressed Archive File (UNIX) 

FORTRAN Program 

Newing-Hall Computer Engraving Software Graphic 

.F00 Kanji Font 

.F01 Perfect Fax Document 

.F06 DOS 6 Pixel Screen Font 



.F09 DOS 9 pixel Screen Font 








.F2 FLASH BIOS File 

.F2R Farandoyle Linear Module Format 

.F3 FLASH BIOS File 

.F3R Farandoyle Blocked Module Format

.F32 Raw 32-bit IEEE Floating Point Values 

.F64 Raw 64-bit IEEE Floating Point Values 

.F77 FORTRAN 77 Program 

.F90 FORTRAN Program 

.F96 Frecom FAX96 Document 

.FA EROSION 3D Flow Accumulation [Format (pdf)] 

.FA1 DATAIR FAS 87/132 Reporter Data File 

.FA2 DATAIR FAS 87/132 Reporter Custom text File 

.FAC Usenix FaceServer Graphic [XnView] 

.FACE Usenix FaceServer Graphic [XnView] 

.FAM Maxis File (unverified) 

The Sims Family File 

.FAQ Frequently Asked Questions 

.FAQT FAQTool XML Contents File 

.FAR Farandoyle Tracker Music Module 

The Sims (Maxis) Archive File [Dragon UnPACKer] 

.FAS 3D Fassade Plus Basic Module 

.FAV MS Outlook Bar Shortcuts [Buy Office XP at Shop.Microsoft] 

.FAX Fax File (various - often TIFF format) [XnView] 

.FBC FamilyTree Compressed Backup File 

.FBD F-22 Lightning Advanced Gravis Joystick Control File 

Remedy Change Management Flashboard 

DART Pro 98 User-definied Complex Restoration Filters 

The Quarterback Pro Coverage Worksheet 

Honeywell Control Builder File (UMC800 Controllers) 

.FBK Navison Financials Backup 

FamilyTree Backup File 

.FBM Fuzzy Bitmap [XnView] 

.FBS File Burner Skin 

.FBX 3D Data Exchange Format 

.FC Harvard Dictionary (Harvard Graphics taken over by Serif) 

.FC2 Curious Labs Poser Face File 

.FCB Forest Cover Attribute Processing File 

FAAST Builder File 

.FCD Virtual CD-ROM 

FastCAD/EasyCAD Output 

Patton & Patton Flow Charting 3 File 


.FCF SHELXL93 File (created by LIST 4 command) [contains: h,k,l,Fc^2,Fo^2,sigma(Fo^2)] 

Altera MAX+PLUS II File 

.FCG Mystic Photo Format 

.FCI EROSION 3D Inflow Table [Format (pdf)] 

.FCM Forward Compression Binary File Patch 

Fluke Networks CableManager File 

.FCP FLAMES Checkpoint Restart File 

.FCS Flow Cytometry Standard Format 

Fantasy Football League Organizer File 

RealProducer Pro Settings 

c-tree Server/Plus Data File 

Canon Zoom Browser EX File 

CD Trustee File 

Spectrum Server Log File 

.FCT Foxpro Catalog 

Campaign Cartographer 2 File 

.FCW Campaign Cartographer 2 File 

FastCAD File [Viewer] 

.FD FORTRAN Declarations [FORTRAN] 

Dataflex Field Compiler Offsets 

.FDB Navison Financials Database 

Legacy Family Tree Database

Art Explosion Portfolio Catalog File 

.FDF Adobe Acrobat Forms Document 

Format Definition File (used by PC connectivity packages uploading to midrange systems) 

.FDI Amiga Disk File (using WinUAE 0.8.17 emulation software) (see ADF) [Amiga Forever] 

.FDL XYRO Active Distribution Console File Distribution List 

.FDM Floppy Disk Manager File [Software?] 

.FDR Final Draft Document File 


.FDW F3 Design and Mapping Document Form 

.FDX Force Index 

.FEB WordPerfect Figure Editor Button Bar 

.FEC U.S. Federal Campaign Expense Submission File [Also FILPAC] 

Ferite Programming Language File (http://www.ferite.org is listed but non working) 

.FEM CADRE Finite Element Mesh File 

.FEP MS WEFT Embedding Project 

.FEX Focus File 

.FF AGFA CompuGraphics Outline Font Description 

Sigmac Source File 

.FFA MS Fast Find File 

.FFF GUS PnP Bank 

defFax Fax Document 

Maggi Hairstyles & Cosmetics [XnView] 

.FFL MS Fast Find File 

PrintMaster Gold Image File 

Alien vs Predator Archive [Dragon UnPACKer] 

.FFO MS Fast Find File 

.FFT DCA/FFT Final Form Text 

MS Fast Find File 

.FFX MS Fast Find File 

.FGA Folder Guard Attributes 

.FGD Folder Guard Data 

Half-life Modification Map Configuration File (also see .BSP) 

Digital Raster Graphic Metadata File 

.FGP Folder Guard Passwords File 

.FH3 Aldus Freehand 3 Drawing 

.FH4 Aldus Freehand 4 Drawing 

.FH5 Freehand 5 



.FH8 Macromedia Freehand 8 

.FH9 Macromedia Freehand 9 

.FH10 Macromedia Freehand 10 [Tech note] 

.FI FORTRAN Interface File [FORTRAN] 

Flash Image [XnView] 

.FIC Windev Database System 

.FID Bruker Aspect NMR Data File 

.FIF Fractal Image Format 

FIF (Iterated System) [XnView] 

SpinRite Hard Disk Fingerprint File 

.FIG REND386/AVRIL Graphic 

Super Nintendo Game-console ROM Image [See ZNES or SNES9x] 

.FIL dBase Files List Object 

WordPerfect Overlay 

Application Generator File Template 

ACL For Windows Data File (data mining software) 

Cardbox Database 

File List (various) 

.FIM Construsyc/Instasyc File 

.FIN WordPerfect Print Format Text 

Perfect Writer Print Formatted Text

ATI Radeon Video Driver File 

.FIO ULead Viewer Support File 

.FIP FingerPost Information Processor File (REMOTE.FIP is parameter file) 

.FIRE FireStarter Project File 

.FISH 3d Fish Tank Saved Fish 

.FISHES 3d Fish Tank Saved Fishes 

.FISHTANK 3d Fish Tank Saved Fishtank 

.FIT FITS Graphic (Flexible Image Transport System) [XnView] 

MS Windows NT File Index Table 

.FITS FITS Graphic (Flexible Image Transport System) [XnView] 

.FIX Generic Patch File 

.FKY Foxpro Macro 

.FLA Macromedia Flash Movie Authoring File 

.FLASK FlasKMPEG Language Definition File (ASCII text file) 

.FLB Papyrus Format Library 

VersaPro Folder Backup 

.FLC AutoDesk FLIC Animated Picture [XnView] 

FLIC Video (may be same as above) 

.FLD Charisma Folder 

Hijaak Thumbnail Folder 

WinFlash Educator Flashcard Options/Statistics File 

VersaPro Folder Contents 

3D Fassade Plus Field Define Module File 

.FLEX Flexi Data Smoothing (Contact for program) 

.FLF Corel Paradox Form 

OS/2 Driver File 

Navison Financials License File 

Firehand Lightning Graphic Collection 

.FLH FLIC Animation (DTA) 

.FLI Autodesk FLIC Animation [XnView] 

EmTeX Font Library 

.FLL Foxpro Library 

The Sims Floor File 

.FLM AutoCAD Film 

Medi@Show File 

"RealPixel" Animation File (various) 

.FLO MicroGrafx FlowCharter File 

.FLOOR Structural Concrete Software Floor Data File 

.FLP Fruityloops Saved File 

.FLR Live3D File 

The Sims (Maxis) Floor Texture File 

.FLS Farrukh Imposition Purlisher Filelist Document 

WinFlash Educator Flashcard Source File 

.FLT Corel Graphic Filter 

StarTrekker Music Module 

MulitGen Open Flight File 

WinFlash Educator Flashcard Compiled Test File 

OS/2 Warp Filter Device Driver 

Asymetrix Graphics Filter Support File 

Micrografx Picture Publisher Filter 

FLIC Animation (DTA) 

MS Graphics Filter 

FileMaker Filter 

CoolEdit Pro Filter [PAF filter] 

.FLX FLIC Animation (Tempra Pro, Mathematica, U-Lead, 3DStudio MAX) 

Dataflex Ordered Binder 

DataFlex Compiled Binary File 

.FLZ Medi@Show Data File 

WinFlash Educator Flashcard Compiled Study File 

.FM Adobe FrameMaker Document

FileMaker Pro Spreadsheet 

.FM1 Lotus Spreadsheet File 

.FM3 Harvard Device Driver (Harvard Graphics taken over by Serif) 

1-2-3 Format File 

FileMaker 3 Database Document 

.FMB WordPerfect File Manager Button Bar 

Oracle Binary Form Source Code 

.FMC NCAD File (woodworking CAD program) 


.FMD Open Access File 

.FMF IBM LinkWay Font or Icon 

.FMG FreeMarkets® Graphics Browser (ActiveX Viewer) 

.FMGEN FlexiMusic Generator 

.FMK PowerStation FORTRAN Make File [FORTRAN] 

.FML GetRight File Mirror List 

Oracle Mirror List 

.FMMUS FlexiMusic Producer 

.FMO dBase Ordered Format 

.FMORC FlexiMusic Orchestra 

.FMP FileMaker Pro Document 

.FMT Format File 

Style Sheet 

Oracle Text Form Format 

dBASE IV Format File 

MS Schedule+ Print File 

MS Visual FoxPro Csreen Format File 

Cardbox Format File (database program) 

.FMV Frame Vector Metafile 

.FMX Oracle Executable Form 

.FMZ Form*Z Project File 

.FMZIP FlexiMusic Zipper 

.FN3 Harvard Graphics Font (Harvard Graphics taken over by Serif) 

.FND MS Explorer Saved Search 

.FNG Font Navigator Group File 

.FNK FunkTracker Module 

.FNO Folio Infobase [May be mistype of .NFO] 

.FNP FlashNpack (convert Flash Movies) [product in beta as of Feb 2002] 

.FNT Font File (Windows 3.1) 

.FNX Exact Inactive Font 

.FO1 Borland Turbo C Font 

.FO2 Borland Turbo C Font 

.FOB Navision Attain Object File 

.FOC FOCUS/WebFOCUS Database File 

.FOG Fontographer Font 

Computer Generated Forces for Action Fog Defaults 

.FOL 1st Reader Saved Message Folder 

.FOLDER Mail Folder 

.FON Font File 

Telix Dialing Directory 

Procomm Plus Call Log 

.FOO Kai's SuperGoo Fusion 

.FOR FORTRAN Source [FORTRAN] 

WindowBase Form 

.FOT Installed TrueType Font 

.FOUR VAX CRYSTALS Chemical Crystallogaphy File 

.FOW Family Origins File (Genealogy) 

.FOX FoxBase File 

.FP FileMaker Pro File 

FoxPro Configuration Info 

GoldMine Business Contact Manager Report

.FP1 Flying Pigs for Windows Data 

.FP3 FileMaker Pro File 

Imsi FloorPlan 3D 

.FP5 FileMaker Database Design Report Template 

.FPA Franklin Potter Associates Business Invoice Designer 

.FPB FLAMES Playback File 

.FPC FoxPro Catalog File 

.FPF Canadian Flight Wizard (flight planning software) 

.FPG DIV Game Studio Multi Map [XnView] 

.FPK JetForm FormFlow File (JetForm now Accelio) 

.FPR FLAMES Prototype File 

.FPS Operation Flashpoint Game File 

.FPT FileMaker Pro File 

FoxPro Memo Fields 

.FPW FloorPlan Plus Floorplan Drawing 

.FPX FlashPix Bitmap [IrfanView] 

.FQF FlashFXP Queue File 

.FQY FLAMES (FLARE) Command File 

.FR3 dBase IV Renamed dBaseIII+ Form 

.FRA FrameViewer File 

.FRC FLAMES RECORD Output File / FLARE Input File 

.FRE Creative Digital Blaster Digital VCR File 

Male Normal CT [XnView] 

.FRF FontMonger Font 

.FRG dBase IV Uncompiled Report 

.FRL FormFlow File 

.FRM Form File 

FrameMaker Document 

FrameBuilder Document 

Oracle Executable Form 

Visual Basic Form 

dBASE IV Report File (and others) 

WordPerfect Merge Form 

DataCAD Symbol Report File 

Megalux Frame [XnView] 

MYOB Form File 

.FRO dBase IV Compiled Report 

FormFlow File (and possibly other form programs) 

.FRP PerForm Pro Plus Form 

FaxRush Packages (listing of fax files - now .ZPK) 

.FRS WordPerfect Graphics Driver 

.FRT FoxPro Report File 

.FRX Visual Basic Binary Form File 

FoxPro Report File 

.FRZ FormFlow File 

.FS NetBSD File (usually BOOT.FS) 

PDT Feature Structure File 

FormSaver File 

FlexiSIGN File 

.FSC Campaign Cartographer 2 File 

FLAMES Scenario File 

.FSF Convert It! Factor File 

fPrint Audit Tool File 

.FSH EA Sports Game Graphic Editor File 

.FSI FileSplit 

.FSL Borland's Paradox 7 Forms 

Corel Paradox Saved Form 

.FSM Farandoyle Sample Format 

.FSR File Substring Replacement Utility 

.FSS Iomega Backup File Selection Set

.FST FastStats Analyzer File 

dbFast Linkable Program 

.FSX Lotus 1-2-3 Data 

FormSaver Fields 

.FSY PhotoFantasy Image [XnView] 

.FT Lotus Notes Full Text Index 

.FTB Roots3 Index File 

.FTG Windows Help Full-text Search Group File 

.FTM Family File 

MicroGrafx Font 

.FTP FTP Configuration Information 

.FTS Windows Help Full-Text Search Index File 

Flexible Image Transport System [XnView] 

.FTV Forest & Trees File 

.FTW Family File 

FontTwister File (text effect generator) 

.FU F* You Software Key Generator (Software protection breaker) 

.FUL Full Foram Count File 

.FUN Koolmoves File (Flash tool) 

.FUZZY Fuzzy Logic File 

.FVF Fluke View 

.FVML formVista (web application development environment) - Product in alpha Jul 2002 

.FVPL Frozen Vertex Pair List File 

.FVS Forest Vegetation Simulator Tree Data File 

.FVT Interlock Public Computer Utility 

.FW Framework Database 

.FW2 Framework II File 

.FW3 Framework III File 

.FW4 Framework IV File 

.FWB FileWrangler Data File Backup 

.FWL FileWrangler EXE Library 

.FWS FileWrangler Data File for File Splitting Configuration 

.FX FastLynx On-Line Guide 

.FXD WinFax Sent Document (TIFF format) 

FAXit Phonebook 

.FXI File-Ex File 

.FXM WinFax & WinFax MiniViewer Fax 

BigFix 

.FXO Fax Image Document [Open with Quick view Plus] 

.FXP FoxPro Compiled Source 

.FXR WinFax Received Document (TIFF format) 

.FXS WinFax Fax Transmit Graphic 

.FXT Finale Music Notation Software Plug-in 

.FYI Flow-Cal File (natural gas operations) 

.FZB Casio FZ-1 Bank Dump 

.FZF Casio FZ-1 Full Dump 

FontZip Font Packer 

.FZV Casio FZ-1 Voice Dump 

GGGGGGGGGGGGGGGGG http://pulsar.sitemynet.com 

.G Applause Data Chart 

Cliq Accessories Datebook Schedule Group [Linux Suite PDF Description] 

.G3 G3 FAX File [XnView] [IrfanView] 

.G32 GFA BASIC 32 Program File 

PaperPort File 

.G3D GenDesigner 3.x Genealogy Database 

.G3F Zetafax TIFF File (fine resolution) 

.G3N Zetafax TIFF File (normal resolution) [XnView] 

.G4 GTX RasterCAD File

Access [XnView] 

.G42 ADAPTA DLS/32 Supply Chain Planning (ASCII file with info about SKUs and product-groups) 

.G53 ADAPTA DLS/32 Supply Chain Planning (ASCII file with info about Bills of Material) 

.G8 PicLab Plane Three Graphics 

.GAC Global Audio Control Skin 

.GAF Total Annihilation [XnView] 

.GAL Gallery of Pictures 

Corel Multimedia Manager Album 

.GAM GammaFax Fax Document 

TADS 2.x Game File 

Baldur's Gate Game File 

The Games Factory, Multimedia Fusion, Click and Create Game File 

All Looking Glass Studio Dark Engine Games [Fan Site - LGS no longer in business] (Dark object 

hierarchy) 

Animated E-mail (unverified) 

.GAP Electrical Generation Analysis and Planification 

.GAT Gator File (password manager) 

.GAU Gaussian Input File (MIME type chemical/x-gaussian-input) 

MS Flight Simulator Gauge (e.g., altimiter.gau) 

.GAY Reported as Sometimes a Porn File (presumably a renamed standard graphic file) 

.GB Chinese 

Nintendo GameBoy Emulator ROM Image File 

Printfox/Pagefox [XnView] 

.GBA Nintendo® Game Boy Advance ROM Image 

GrabIt Batch Files 

.GBC Nintendo® GameBoy Color Emulator ROM Image File 

.GBD Gator Banner File 

.GBK Interbase Database Backup 

.GBL VAXTPU Global Definitions (VAXTPU is default OpenVMS editor) 

.GBR GIMP Brush File [GIMP] [XnView] 

Gerber Format File (Graphics Language for the Electronics Industry) [Viewer] 

.GBS Gameshark Online Save/Snapshot 

.GBT Photoshop File 

.GC Sierra Print Artist Greeting Card 

.GC1 Golden Common Lisp Source Code 

.GC3 Golden Common Lisp Source Code 

.GCA GOCA Graphics File 

G Compression Archiver Compressed File (link is Japanese site) [Mime Type application/x-gcacompressed] 

.GCC VISUAL EPR COSEUL.EXE Result (table of components of Cartesian tensors) 

.GCD Generic CADD Drawing 


Prassi CD Image 

GNUe Class Definition 

.GCF WinXComp Grouped Compressed File 

.GCI GTA2 Game File 

VISUAL EPR COSEUL.EXE Result (table of components of irreducible tensors) 

.GCM GeoConcept Map File 

Group Mail CMessage Store File 

.GCP Ground Control Point File (map projection) 

.GCR VISUAL EPR COSEUL.EXE Output 

.GCT ApplinX Screen Scrapper (unverified) 

.GDB Interbase Database 

Group Mail File 

.GDF GEOS Dictionary 

.GDG ReliaSoft RG (Reliability Growth Analysis Software) 

.GDM Bells, Whistles, and Sound Boards Module 

.GDR SymbianOS Bitmap Font File (can contain multiple typefaces) 

.GDS Image File 

Chip Layout Information

.GED GEDCOM Family History File 

EnerGraphics File 

Graphic Environment Document 

Arts & Letters Graphics File 

.GEM GEM (a desktop interface) File 

Digital Research GEM Paint [XnView] 

Ventura Publisher Vector Graphics 

.GEN Ventura-Generated Text File 

Chromeleon Generic Driver Configuration 

dBase Application Generator Compiled Template 

.GEO VideoScope File 

GeoSoft Compressed Add-on 

Geoworks Geode 

GeoPaint [XnView] 

Trumpf ToPs File (CAD/CAM, laser cutting) 

.GER GerberView File (partial support for extended Gerber [RS-274X] file format) 

.GF gFx UNIX Plotting Program 

METAFONT Generic Font File 

Geometric Data 

Pilot Logbook for Grok File 

Starfleet Command - Empires At War File 

.GFA Bitmap Graphics File (see .GFX/Warcraft; files are similar) 

.GFB GIFBlast Compressed GIF Image 

.GFC Patton & Patton Flowcharting 4 File 

.GFD Menus for GNUe Forms 

VISUAL EPR Energy, Fields File 

.GFI Genigraphics Graphics Link Presentation 

.GFT NeoPaint Font 

.GFX Genigraphics Graphics Link Presentation 

WarCraft II Image File 

.GFY Grafical 1.0 File 

.GG Sigmac Compiled Machine Code 

Gridgen File 

Sega GameGear Game ROM Image 

Koala Paint Compressed File [XnView] 

.GG1 Goofy Golf Deluxe Course 

.GG2 Goofy Golf Deluxe Saved Game 

.GGI GGI Extension 

.GGP GemCom Graphic Format 

.GGS Gameboy Emulator File [No$gmb ] 

.GHO Symantec Ghost Disk Image File 

.GHS Lasertank High Scores 

Symantec Ghost Disk Image Span File (only used if disc is over 2GB - see .GHO) 

.GI Sony CD Extreme Global Image File 

.GIB Graph-in-the-Box Chart 

.GID Windows Help Index File 

.GIF Graphic Interchange Format [XnView] [IrfanView] 

.GIFF Graphic Interchange Format [XnView] [IrfanView] 

.GIG Sound File 

.GIM Genigraphics Graphics Link Presentation 

.GIW Graph-in-the-Box Presentation 

.GIX Genigraphics Graphics Link Presentation 

.GJD 7th Guest Game Archive 

11th Hour Game Archive [Dragon UnPACKer] 

GetJet Professional Database (really an Access database) 

.GJF Gaussian Input Data File 

.GKH Ensoniq EPS Family Disk Image 

.GKS Gravis GripKey Document 

.GL GRASP - Graphical System for Presentation File 

.GLD Glide File

.GLM Glim Data File 

.GLY MS Word Glossary [Buy Office XP at Shop.Microsoft] 

.GM Autologic [XnView] 

.GM2 Autologic [XnView] 

.GM4 Autologic [XnView] 

.GM? Heroes of Might & Magic III Saved Game (? = number of human players in game) 

.GMAX gmax Game Creator 

.GMD Game Maker Stored Game (game under development--also see .GMR) 

.GME Interact DexDrive Playstation Memory Card Save 

.GMF Applause CGM Graphics 

.GMM Group Mail Message Log File 

.GMP GTA2 Game File 

Group Mail List Information File 

Geomorph Tile Map 

.GMR Schlafhorst Automation Graphical Monitor Record 

Game Maker Compiled Game (finished game--also see .GMD) 

.GMS Corel Global Macro File 

.GMT Scarlett Expert System Compiler Grammar File (Scarlett is not presently available) 

.GMX Group Mail Message File 

.GNA Genigraphics Graphics Link Presentation 

.GNO Genopro Genealogy Document File 

.GNT Micro Focus Generated Code 

.GNUMERIC Gnumeric Default XML-based File (replacement for proprietary spreadsheets) 

.GNX Genigraphics Graphics Link Presentation 

.GOB Dark Forces Game File [Dragon UnPACKer] 

Indiana Jones 3D Archive [Dragon UnPACKer] 

.GOC Geoworks Goc Source Code 

.GOH Geoworks Goc Header 

.GOO Kai's Power Goo / Kai's Supergoo 

.GOR Gorilla (Film & Video Production Management) 

.GP Geoworks Glue Geode Parameter File 

.GP3 CCITT Group 3 File (fax) 

GuitarPro 3 

.GP4 CCITT Group 4 File (fax) 

.GPD VISUAL EPR Input Data for PARAMS.EXE 

.GPF Believed to be a Japanese graphic file 

.GPG GnuPG Encrypted File (usually compatible with .PGP files) 

.GPH Lotus 1-2-3 Graph 

Stata Graph 

.GPK Omnigo Program Package [Added Info] 

.GPL GPS Log File (used by mapping software) 

.GPP GraphPap Graph Paper File 

Serif GraphicsPlus Object 

.GPR VISUAL EPR PARAMS.EXE Results 

.GPS Pocket CoPilot GPS Tracks Data File 

.GPX BASIS File 

.GQA BI/Query Data Model Admin Layer 

.GQL BI/Query Data Model (used to be Andyne GQL) 

.GQU BI/Query Data Model User Layer 

.GR XGMML (eXtensible Graph Markup and Modeling Language) File 

.GR2 Windows 3.0 Screen Driver 

.GR3 Windows 3.0 Screen Grabber 

.GRA Flight Simulator File 

MS Graph Chart 

SigmaPlot Data File 

STN Express Transcript Graphics File (search science databases through STN®) 

.GRAAL Offical Graal Level 

.GRB MS-DOS Shell Monitor 

.GRD Gradebook Power File 

Map Projection Grid File

.GREY Picture File (raw GREY graphics) RAW RGB 24-bit Graphic [XnView] 

.GRF Graph 

Graph Plus Graph File 

Golden Software Graph File 

Grafix Idea File 

Graph Edit File [Part of DirectX SDK] 

DLG "Graphic" Format 

.GRL Matlab Graphic Format 

.GRM VISUAL EPR Input Data for FIntGraf 

.GRN Granny 3D Rendering Program 

.GRO Serious Sam Game File [Dragon UnPACKer] 

Warlords Battlecry Archive [Dragon UnPACKer] 

HP-48/49 GROB [XnView] 

.GRB HP-48/49 GROB [XnView] 

.GRP Windows Program Manager Group 

PixBase Pictures Group 

Duke Nukem 3D Archive [Dragon UnPACKer] 

Shadow Warrior Archive [Dragon UnPACKer] 

.GRQ Quickstep Barco Graphics 

.GRS Packedge Barco Graphics 

.GRT VISUAL EPR Calculation Results of Fields 

.GRV Groove Networks File 

.GRX GetRight File List 

.GRY Picture File (raw GREY graphics) RAW RGB 24-bit Graphic [XnView] 

.GS1 GraphShow Presentation 

.GSC GeneStudio File (Molecular Biology Software) 

.GSD Professional Draw Vector Graphics 

.GSM Raw GSM 6.10 Audio Stream (Global System for Mobile Audio) 


US Robotics Modem File 

.GSP Geometer's Sketchpad Material File 

.GSW GraphShow Worksheet 

.GT2 Graoumftracker Music Module (new) 

.GTK Graoumftracker Music Module (old) 

.GTP GuitarPro File 

MultiFS Video File 

.GTS Genome Software Tempo Alarm Clock 

.GTY Gibson Tray File 

.GUP PopMail Data 

.GUR Gutsch & Exner Software Update Undo 

.GUX Gutsch & Exner Software Update 

.GV Grandview (DOS-based outline program by John Friend who licensed to Living Videotext; bought by 

Symantec) 

.GWI Groupwise File (binary file that contains link information) 

.GWK GraphiCode Printed Circuit Board Drawing [Use GC Prevue to view] 

.GWP Greetings WorkShop File [Now MS Picture It!] 

.GWS GeoMedia Geoworkspace File 

.GWX Genigraphics Graphics Link Presentation 

.GWZ Genigraphics Graphics Link Presentation 

.GX1 Show Partner Graphics File 

.GX2 Show Partner Graphics File 

.GXC General CADD Pro File 

.GXD General CADD Pro File 

GX-Reports File 

Jeol EX Spectrometer Data File 

.GXF General CADD Pro File 

.GXL Genus Graphics Library 

.GXM General CADD Pro File 

.GXP Jeol EX Spectrometer Data File 

.GXR Genexus Report Viewer

GX-Reports File 

.GXT GTA2 Game File 

.GYM Sega Genesis Music Logged Format 

.GZ Gzip Compressed Archive 

.GZIP Gzip Compressed Archive (more usually seen as .GZ) 

HHHHHHHHHHHHHHHHHH http://pulsar.sitemynet.com 

.H Header (Usually C Compiler) 

.H1 Bruker Aspect NMR Data File 

.H3M Game Map File (used by a large number of games) 

.H4R Possible Container for .MP3 Files (MUSIC.H4R) 

.H! Flambeaux Tutorial Database 

.H++ C++ Header File 

.H-- Sphinx C-- Header File 

.HA Compressed Archive 

.HAD MixlleniumEngine (Haydee) Web Server Module Style File (XML format) 

.HAK GameHack File (instruction codes to apply to memory to hack a game) 

.HAL Mortyr Archive [Dragon UnPACKer] 

.HAM Image File 

.HAN Viewpoint Headline Studio (Viewpoint used to be MetaCreations) 

.HAP Compressed Archive 

.HAT HAT (HOORA Analysis Tool) Model 

.HAY MixlleniumEngine (Haydee) Web Server Module Content File (XML format) 

.HBC Home Buyers Calculator Suite 

.HBK Mathcad Handbook 

Humanic Software Accounting Data 

.HC BI/Suite Hypercube 

.HCM IBM HCM Configuration 

.HCR IBM HCD/HCM Production Configuration 

Half-fold Card File (Printmaster and others) 

.HCT Symantec Anti-Virus Live Update File (usually LIVEUPDT.HCT) 

.HD2 Curious Labs Poser Hand File 

.HDA HotDocs Document 

.HDB Nero File (CD burning/design software) 

.HDF Hierarchical Data Format File 

Help Development Kit Help File 

.HDL Procomm Plus Alternate Download File Listing 

.HDML Handheld Markup Language File (WAP phones; browser prior to 4.X) 

.HDP Magix Music/Video 

.HDR Procomm Plus Message Header 

PC-File+ Database Header 

Egret Data File 

ArcInfo Binary [XnView] 

Adobe Photoshop File 

Apollo HDRU [XnView] 

.HDRU Apollo HDRU [XnView] 

.HDW Harvard Draw Vector Graphics 

.HDX Help Index (Various) 

.HED HighEdit Document 

Hi-Eddi [XnView] 

ReliaSoft RG (Reliability Growth Analysis Software) 

.HEH Scarlett Expert System Compiler Facts File (Scarlett is not presently available) 

.HEL MS Hellbender Saved Game 

.HEX Hex Dump 

Macintosh BinHex 2.0 File 

.HF HF File [XnView] 

.HFI HP Font Info 

.HFS Macintosh Disk Image on CD [FAQ] 

.HFV Simulated Macintosh Volumes on PC Hard Drive [Executor] [HFVExplorer]

.HFX HotFax File 

US Robotics Rapid Comm Voice Data File 

.HFZ Pinnacle Studio Video Editing File 

.HGH Star Wars - Tie Fighter High Score 

.HGL HP Graphics Language (plotter) [SwiftView] 

.HGS HighGrow Virtual Seed File 

.HH C++ Header 

Help Topic Map File 

HammerHead Drumloop File 

.HHC Table of Contents File (HHW Application) 

TurboTax Contents File 

.HHH Power C Precompiled Header 

.HHK Help Workshop Index File 

.HHP Procomm Plus Help Data 

.HHP HTML Help Project 

.HIN HyperChem Molecule 

.HIR C64 Hires [XnView] 

.HIT HitPlayer Audio File 

Nonags Dialog Killer Data File 

The Sims (Maxis) Sound File 

.HJT TreePad Hypertext Database File 

.HLB VAX Help Library 

.HLN Microstation Hidden Line File (unverified) 

.HLP Windows Help File 

Stata Statistical Software Help File [Text files whose format predates Windows] 

.HLX Visual C++ Syntax Coloring Instructions 

ATI Radeon Video Driver Support File 

Hyperlatex File 

Multi-Edit Help File 

.HLZ Multi-Edit Packed Help File 

.HM2 Help & Manual Help File Project 

.HM3 Help & Manual Help File Project (ver 3) 

.HMI Descent Human Machine Interfaces MIDI File 

.HMM Procomm Plus Alternate Mail Read Option Menu 

.HMP Descent Human Machine Interfaces MIDI File 

.HMS Stentura 8000 or Stentura 8000LX Deposition File (court record) 

MS SMS Inventory File 

HMS Archiware File (unverified) 

.HMX MixlleniumEngine (Haydee) Web Server Module Template File (XML format) 

.HM~ Help&Manual Backup Help File Project 

.HNF Humax Receiver Settings 

.HNV TheWord & Bible Companion Hebrew Names Version Bible 

.HO Magix Music/Video 

.HOF Hall Of Fame (scores) 

.HOG Lucas Arts Dark Forces WAD File 

Descent Mission File [Dragon UnPACKer] 

.HOT The Sims (Maxis) Sound File 

.HP HP Graphics Language (plotter) [SwiftView] 

.HP8 HP NewWave Write ASCII Roman8 Character Set 

.HPD Harry Potter Related 

.HPF PageMaker HP LaserJet Fonts 

HotLine Partial Download File 

.HPG HP Graphics Language (plotter) [SwiftView] 

.HPGL HP Graphics Language (plotter) [SwiftView] 

.HPI Gem Font Information 

Hemera Photo-Object Image [XnView] 

.HPJ Help Project File 

.HPK Compressed Archive 

.HPL HP Graphics File 

.HPM Procomm Plus Alternative Menu

HP NewWave Emm Text 

.HPP Borland C++ Builder 6 Program Header 

InfoMgr Database File 

.HPR RoboHELP Configuration File 

.HQX Binhex Text Conversion File (Macintosh) 

WinXP Game File (sorry no details were in the submission) 

.HR2 Curious Labs Poser Hair File 

.HRF Hitachi Raster Format Graphic 

.HRL Herolab EasyWin32 

.HPM Procomm Plus Alternate Main Menu 

.HPP Zortech C++ Header 

.HPR RoboHelp Configuration 

.HQX Macintosh BinHex 4 Compressed Archive 

.HR TRS 80 Graphic [XnView] 

.HRM Procomm Plus Alternate Main Menu 

.HRU HRU File [XnView] 

.HRX Herolab EasyWin32 

.HRZ Slow Scan Television [XnView] 

.HS Hugs Source Code 

.HS2 Postering Monochrome Image 

.HSC HelpScribble Project 

.HSE Dreamweaver Snippet (pre-MX version) 

.HSI Handmade Software Graphic File 

.HSK Nimbus 7 SAMS Data File (Daily ASCII files) 

.HSM The Sims (Maxis) Sound File 

.HSQ Data File Associated with Qaz Trojan 

CAST Application Mining Suite (Query file to generate HTML from Database Server) 

.HSS Photoshop Hue/Saturation Information 

Dreamweaver Snippet (pre-MX version) 

.HST History File 

Netscape History File 

Corel QuickCorrect and Speller History File 

Procomm Plus History File 

File Associated with WordPerfect (history?) 

Symantec Anti-Virus Live Update File (usually LIVEUPDT.HST) 

Yahoo Messenger History 

Host File 

.HT HyperTerminal 

.HTA Hypertext Application (run apps from HTML doc) 

Hemera Thumbnail Archive 

.HTACCESS Apache Access Configuration File 

.HTC HTML Component (mechanism for implementing Dynamic HTML in script) 

.HTF WebBase File 

HTF Sounding File (link is PDF file) 

Virtual Hypertext Font (TeX-based) [Basic Info] 

.HTI WebBase File 

.HTM Hypertext Markup Language (HTML) 

.HTML Hypertext Markup Language (HTML) 

.HTT Hypertext Template 

.HTX Extenended Hypertext Template 

Internet Database Connector File 

.HULL Halflife Map Collision Hull File 

.HUS Husqvarna Designer I Embroidery Machine Format [possibly read with Melco Sizer Software] 

.HUY Eto Dlia Vas 

.HVD chosenOS HoverNews Skin File 

ISIS Hviews File (chemical reaction database) 

CMT Surveyor's Assistant 1.x/2.0x Job 

HerdView Event Data File 

.HWCFG VersaPro Hardware Configuration File 

.HWD Hollywood Presentation File

.HWL Hangman Deluxe Word List 

.HWP Hangul (Korean) Word Processor File 

.HX EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename 

starts with E] 

.HXM Procomm Plus Alternate Protocol Selection Menu 

Descent2 HAM File 

.HXS Help 2 File (replacement for .CHM) 

.HXX C++ Header 

.HY1 Ventura Publisher Hyphenation Algorythm 

.HY2 Ventura Publisher Hyphenation Algorythm 

.HYC WordPerfect Hyphenation File 

.HYD WordPerfect Hyphenation Dictionary 

.HYP Hypertext File 

Hyphenation File 


Compressed Archive 

.HZ Chinese 

I I I I I I I I I I I I I http://pulsar.sitemynet.com 

.I Progress Include File 

Borland C++ Intermediate File 

INTERCAL File (INTERCAL=Compiler Language With No Pronounceable Acronym) 

.I17 Pixel Power Collage [XnView] 

.I18 Pixel Power Collage [XnView] 

.I2S Invision for mIRC Settings 

.I66 Interactive66 Graphic Design Information 

.IAF MS Outlook 97 and 2000 E-mail Account Settings 

.IAM Autodesk Inventor CAD File 

.IAN Sterling Software COOL Business Team Model File Sterling merged with Computer Associates. 

.IAP TeamBG File (modify Infinity Engine games) 

.IAX IBM Image Access Executive Bitmap 

.IB7 Pixel Power Collage [XnView] 

.IBA MDE InfoHandler Infobase File 

IBasic Source Code File 

.IBF Instant Backup 

.IBL IBasic Component Language File 

.IBM Electronic Arts Deluxe Paint [XnView] 

Archdos Compressed File (IBM internal file) 

.IBS i2 iBase File 

.IBX Interscope BlackBox File (encryption program) 

.IC1 ZyIMAGE Index 

.ICA Citrix File 

Image Object Content Architecture (IOCA) Graphics File [XnView] 

.ICB Targa Bitmap 

Image Capture Board [XnView] 

.ICC Kodak Printer Image 

IronCAD Catalog 

.ICD IronCAD 2D CAD File 

ASTi Model Builder File 

Rate Structure File (BLDRATE.EXE input) 

File Associated with Many Games 

.ICE Archive File 

.ICF ICOM CS-2100 Radio Programming Data 

Insane Chat Saved Conversation [ASCII file] (Use care entering this site) 

.ICL Icon Library File (various) ImageForge/IconForge Microangelo [XnView] [IrfanView] 

Clean File (functional programming language) 

.ICM Image Color Matching Profile File 

ICC Profile, Acer Monotor Drive 

.ICN Icon Program

AT&T Graphic Format 

RIPTerm Image [XnView] 

.ICO Icon ImageForge/IconForge Microangelo [IrfanView] 

GIMP Icon [GIMP] [XnView] 

Sun Icon/Cursor [XnView] 

.ICON Sun Icon/Cursor [XnView] 

.ICQ ICQ Saved File 

.ICS Outlook Calendar File [Buy Office XP at Shop.Microsoft] 

SwiftView Command File 

IronCAD 3D CAD File 

Inovate 3D CAD File 

.ICW InterCAD File (Polish site) 

.ID Disk Identification File 

Lotus Notes ID File 

.IDA MS Server File (default.ida is attacked by the Code Red Worm) 

.IDB MS Developer Intermediate File 

Database Used by Disassembler 

.IDC Core IDC [XnView] 

.IDD MIDI Instrument Definition 

.IDE Integrated Development Environment Configuration File 

Sophos Anti-Virus Virus IDEntity File 

Borland C++ Project 

.IDF MIDI Instruments Drivers File 

ARTiSAN Real-time Studio ID File (UML CASE Tool) [See .PKF] 

.IDI i-deas Web ACCESS File 

.IDIF Netscape Saved Address Book 

.IDL MS Visual C++ Interface Definition File 

OMG CORBA Interface Definition Language 

.IDQ Internet Data Query File 

.IDT Output of DLL2IDT Utility (used in disassembly) 

Text Archive Table (used in software development) 

.IDV Autodesk Inventor Design View Tree 

.IDW Aldus IntelliDraw Vector Graphic 

Autodesk Inventor CAD File 

.IDX Index (multiple programs) 

.IDY Debug Information File (IMS Database related) 

.IDZ i-deas Web ACCESS File 

.IEF Image File 

.IES Photometric File Data [Illuminating Engineering Society] 

.IF9 Pixel Power Collage [XnView] 

.IFD Jet Form Design Form 

.IFF Graphic, Sound (Interchangeable File Format) [XnView] [IrfanView] 

The Sims (Maxis) Object/Data File 

Sun TAAC Image File [XnView] 

.IFM Brighterion iPrevent Fraud Model 

Shana Informed Filler (electronically fillable forms) 

.IFO DVD Info File (contains menus and other information) 

.IFP KnowledgeMan Script 

.IFS OS/2 Warp Installable File System 

IconForge Image EXE Library 

Yuvpak Compressed Fractal Image 

.IFW Luminosity Impact! File 

.IFX ImageSoft v2.00 Graphic 

.IGES IGES-Format [IGES Info] 

.IGF Inset Systems Metafile 

.IGNORE Likely a text file (e.g., README.IGNORE) 

.IGP Igor Reader Sheet Music File 

.IGR Intergraph SmartSketch Drawing 

.IGS IGES-Format [IGES Info] 

.IGX iGrafx Process (graphical process modeling and simulation)

.II C64 Doodle Compressed File [XnView] 

.IIF QuickBooks for Windows Interchange File 

.III Intel Phone Compatible 

.IIM Interscope InstallMaster Setup Project 

Inshape Graphic [XnView] 

iOpus Internet Macro 

.IIMG Interleaf Graphic [XnView] 

.IJS J Interpretor Script File (J Language - Mathematical programming language with APL roots) 

.IKL MS InkBall (accessory for Windows XP Tablet PC Edition - due end 2002) 

.IL Icon Library 

MSIL Assembler Input File 

.ILB Scream Tracker Data 

.ILBM Graphic, Sound (Interchangeable File Format) [may be .IFF file, see above] 

.ILK MS ILink Program Format Outline 

.ILL Adobe Illustrator Prologue 

.ILM Satsang Quiz File 

CAS 200 QDA v3.0 Image List Mode File (DNA mapping) 

Illuminatus Opus Multimedia File 

Iomega Zip Drive Speed Configuration File [Good Info Source] 

.ILPLOPTIONS InterLock and PowerLock (public computer management utility) 

.ILPLVOUCHERS InterLock and PowerLock (public computer management utility) 

.ILS MS Internet Security And Acceleration Server Summary 

.ILV ILOG View File 

.ILVG iLiving P-to-P (iliving file viewer) 

.IM5 Visilog [XnView] 

.IM8 Sun Raster Graphic 

.IMA WinImage File (Floppy and disk imager) 

Mirage Vector Graphics 

PIXELA ImageMixer File (Digital image organizer) [Link is Japanese] 

.IMB IncrediMail File 

.IMC IncrediMail File 

.IMD Caseware IDEA (Data Analysis Tool) 

.IMF ImageForge/ImageForge Image EXE Library 

IncrediMail Letter 

.IMG Bitmap Graphic (several programs) [XnView] [IrfanView] 

AutoCAD CAD-Camera [XnView] 

ERDAS IMAGINE Format 

Planetary Data System [XnView] 

Idrisi32 Raster Image 

Radiance Scene Description Image [XnView] 

CloneCd Related File 

Floppy Image File 

Apple Macintosh Disk Copy Format 

Microtek Eyestar [XnView] 

Sharp GPB [XnView] 

Starbase [XnView] 

Vicar [XnView] 

Vivid Ray-tracer [XnView] 

.IMI IncrediMail Animation 

.IMJ JFIF File With a MS Windows BMP Header (Pegasus Image Corporation) 

.IMM IncrediMail Trash 

.IMN IncrediMail Notifier 

.IMP Urban Chaos Game File 

Lotus Improv Spreadsheet 

Babya Installer Archive 

DVD File 

FileMaker Database Translation Filter 

WinIMP Archive 

.IMQ ImageQ Presentation 

.IMR Cognos Impromptu Report Writer

.IMS Incredimail Graphic 

.IMT IMNET Image [XnView] 

.IMV Yahoo Instant Messenger IMVironment 

.IMW Imageware Surfacer 3D CAD Surface Geometry 

IncrediMail Sound 

.IMY iMelody Ringtone Format (link is PDF file) 

.IMZ Compressed Floppy Image 

WinImage File (Floppy and disk imager) 

.IN$ HP NewWave Install File 

.IN3 Harvard Input Device Driver (Harvard Graphics taken over by Serif) 

.INB Vermont HighText Script 

Visual Expert Source Code Documentation 

.INC Include File (various) 

Internet Connection File (used by ISPs) 

.INCD Adobe InCopy/InDesign Link File (Link stories from an InDesign document) 

.IND dBase IV or DataPerfect Index 

Well of Souls Game File 

.INDD Adobe Indesign Document 

.INF Information or Setup File (many) 

.INFO Amiga Information File [XnView] 

.INI Initialization/Configuration File (many) 

.INK Pantone Reference File 

Mimio Ink File [Electronic Whiteboard] 

.INL MS Visual C++ Inline Function File 

.INP Oracle Source Code 

Self-Extracting Archive Utility Project 

GIS Software Text Input File [GIS info] 


.INS Internet Communication Setting 

AdLib Instrument Music File 

WordPerfect File 

Ensoniq EPS Family Instrument 

Sample Cell / II Instrument 

InstallShield Script 

X-Internet Sign-up File 

Inspiration Mind Mapping Software File 

1st Reader Install Script 

.INSTALL Likely a text file (e.g., README.INSTALL) 

.INT Borland Interface Units 

Foxpro Code Page 

Signature Semi-compiled Program 

Unreal Tournament Mutator 

Intermediate Code used for syntax checking (various) 

.INTER Interspector Project File 

.INTERLOCKFAVOURITES InterLock and PowerLock (public computer management utility) 

.INTO Interspector Object File 

.INU INSPEC Configuration File 

.INX Foxbase Index 

ACL For Windows Index (data mining software) 

.IO Compressed Archive 

.IOB Imagine File 

TDDD Format 3D Graphic Database 

.IOC Instant ORGcharting! Organization Chart 

.IOCA Image Object Content Architecture (IOCA) Graphics File [XnView] 

.IOF Findit Document 

.ION Text Program/Installation Description 

4DOS File Description 

.IP IconPackager File (changes the look of Windows icons) 

.IPD InstallPROG 6 EDBS Install Database 

.IPF Microsoft SMS Installer Script (with System Management Server 2.0)

.IPG Mindjongg Format [XnView] 

.IPH InterPaint Hires Image [XnView] 

.IPK NRG iPack File 

Sharp Zaurus PDA Application Install File 

.IPL Corel Pantone Spot Reference Palette 

InstallPROG 6 EDBS File Library 

.IPP Help & Manual Proprietary Image 

.IPR IntelliJ Project XML File 

.IPS Game Patch File (allows running of illegal copies of some games) 

.IPT Autodesk Inventor CAD File 

InterPaint Multicolor Image [XnView] 

.IPW UniPlot Graph [Free viewer] 

.IPX Interactive Pictures Corporation AV File 

Viewpoint iPix File 

.IPZ ICQ Skin 

.IQF Integra 3.0 Query File 

.IQY Excel Web Query [Buy Office XP at Shop.Microsoft] 

.IRD MS Money Temporary File 

.IRIS Silicon Graphics RGB [XnView] 

.IRS WordPerfect Resource File 

.ISD RapidFile Dictionary 

GraphPad InStat 

InstallShield Dialog 

dynaSight File 

.ISH Compressed Archive File 

Image Speeder [XnView] 

Image System (HiRes) [XnView] 

.ISK Command File (similar to a batch file - view in text editor) 

.ISL InstallShield Temporary Installer File 

.ISM Image System (Multicolor) [XnView] 

.ISO File List for CD-ROM [Fantom CD Emulator] 

ISO Buster File 

InstallShield Uninstall File 

ISO-9660 Table 

Easy CD Creator Disc Image 

.ISP Internet Sign-up File 

Internet Communication Settings 

.ISR MS Streets & Trips Route File 

Uninstaller Text File (_deisreg.isr) 

.ISS InstallShield Response File 

ISS Graphic [XnView] 

Caseware IDEA IDEAScript (Data Analysis Tool) 

.IST Digitrakker Instrument File (by n-FaCToR) 

.ISU InstallShield Uninstall Script 

Easy CD Creator 4 Uninstall File 

Netscape File 

.IT Impulse Tracker Music Module 

Intalk Settings 

.ITE E-Tabs Reader File 

.ITF Inside Tract File 

JPI TopSpeed Pascal Interface File 

.ITG Intergraph Format [XnView] 

.ITH InTether Receiver File (security software) 

.ITI Impulse Tracker Instrument 

.ITM Infinity Engine Game Item 

.ITS Internet Document Set 

Impulse Tracker Sample 

.ITW Icetips Wizard Editor (partially encrypted ini file) 

.IV VRML File 

Open Inventor File

.IVF Indeo Video File 

.IVP Truevision Targa Bitmap [XnView] 

.IVT Beyond 20/20 Table (Multidimensional data viewer) 

Concordance Inverted Full Text Database File 

.IVX Beyond 20/20 Extract (Multidimensional data viewer) 

.IW Iconware Application 

Idlewild Screensaver 

.IW4 DjVu File [XnView] 

.IWA IBM Writing Assistant Text 

.IWI Ignite Image Optimiser 

.IWC Installwatch Database (install monitor) 

.IWP Wang Text File 

.IWR i*write 2.0 File 

.IWR_BAK i*write 2.0 Backup File 

.IX Framemaker Index File 

Paperport Search File 

.IXA Ulead Image File (video CD image) 

.IZD Intrexx Application Export Format (binary) 

.IZT Izl Binary Token 

JJJJJJJJJJJJJJJJJJJJJJJJ http://pulsar.sitemynet.com 

.J Java Source Code 

JAR Compressed File 

.J2B Jazz Jackrabbit 2 Game Music File 

.J2K JPEG-2000 JP2 File [XnView] 

.J62 Ricoh Digital Camera File 

.J6I Ricoh Digital Camera File 

.JAG Jaguar Server File (Atari) 

.JAR Java Archive File (a compressed file for applets and related files) 

.JAS Compressed Graphic 

.JAV Java Source Code 

.JAVA JBuilder Java File 

.JBC Jam Byte-Code Hex File (8051 Microprocessor File) 

BestCrypt File 

.JBD SigmaScan Data File 

.JBF Paint Shop Pro Browser File [XnView] 

.JBG JBIG File [XnView] 

.JBIG JBIG File [XnView] 

.JBK Juno Backup File 

.JBP DJ Jukebox Project 

.JBX Project Scheduler File 

.JC! FlashGet File 

.JD Jigsaw Terminal File (Real-time financial data display) 

.JDB Siren Jukebox 

.JDE Cariverona 

.JDF Turok 2 Game File 

.JDT Accelio Capture Classic (JetForm) Filler (JetForm Corp became Accelio 12 Sep 2001) 

.JDX EDICT Index (EDICT is Japanese/English Dictionary) 

.JEF Janome NH10000 Sewing Machine File 

.JET Hybrid JetFax Fax 

.JFD FormWare Job 

JAWS Voice Synthesis Software 

.JFF JPEG Image 

.JFI JPEG/JIFF Image [XnView] 

.JFIF JPEG/JIFF Image [XnView] 

.JFM Accelio Capture Classic (JetForm) File (JetForm Corp became Accelio 12 Sep 2001) 

.JFX J2 Fax File 

.JG6 BigJig Jigsaw 

.JHTML Dynamo Server Page (Java HTML) 

.JIF JPEG/JIFF Image [XnView]

Jeff's Image Format [XnView] 

.JIS Japanese 

.JJ JavaCC File (Java parser generator) 

.JLF JetLinks Bookmark Managment 

.JLS JPEG-LS File [XnView] 

.JMP SAS JMPDiscovery Chart-to-statistics File 

.JMS Voxtron TeleButler Graphical Voice Response Call Flow 

.JMX JMeter File (Web performance testing) 

.JN1 Epic MegaGames Jill of the Jungle Data File 

.JNB Sigma Plot Workbook File 

.JNG JPEG Network Graphic [XnView] 

.JNK Junk (temporary file) 

.JNL Ingres Journal File 

.JOB Job File 

Task Scheduler Task Object 

AI Research File 

QuestVision Vector Graphics File (IMG File Conversion) 

.JOBOPTIONS Acrobat Job Options File 

.JOD Microsoft.Jet.OLEDB.4.0 Related File 

.JOR MS SQL Server Journal File 

.JOT WinJottr Desktop Note 

JDesignerPro File 

.JOU VAX Edt Editor Journal Backup 

.JP2 JPEG-2000 JP2 File [XnView] [Kakadu] 

.JPC Picture File (Japanese) 

JPEG-2000 Code Stream [XnView] 

.JPE JPEG/JIFF Image [XnView] [IrfanView] 

.JPEG JPEG/JIFF Image [XnView] [IrfanView] 

.JPG JPEG/JIFF Image [XnView] [IrfanView] 

.JPL Siren Jukebox 

.JPS Stereo Image [XnView] 

.JPX JBuilder Project File 

JPEG-2000 JP2 File [XnView] 

.JS JavaScript Source Code 

.JSB Henter-Joyce, Inc. Jaws Script Binary File (Screen reader program) 

.JSD eFAX Jet Suite Document 

Henter-Joyce, Inc. Jaws Script Documentation File (Screen reader program) 

Join-Split File 

.JSE JScript Encoded Script File 

.JSF Macromedia Fireworks Batch Script 

.JSH Henter-Joyce, Inc. Jaws Script Header File (Screen reader program) 

.JSL PaintShop Pro File 

.JSM Henter-Joyce, Inc. Jaws Script Message File (Screen reader program) 

.JSP Java Server Page 

.JSS Henter-Joyce, Inc. Jaws Script Source File (Screen reader program) 

JSheet (Spreadsheet Application Server) 

.JSV Java Structure Viewer 

HyperRail 3D Coaster Design Screen Shot 

Japanese Flash Card File 

VXML JavaServer Page 

.JSW WML JavaServer Page 

.JT JT Fax 

.JTD Ichitaro 11 (major Japanese word proccesser) 

.JTF JPEG Tagged Interchange Format Image 

Hayes JT Fax [XnView] 

.JTK Sun Java ToolKit File 

.JTP JetForm File 

.JVC Digital Camera File 

.JW Justwrite Text 

Jigsaw Terminal File (Real-time financial data display)

.JWL Justwrite Text File Library 

Easy CD Creator's CD Label 

.JWP JWP Document (Japanese word processor) 

Easy CD Creator Label File 

.JZZ Jazz Spreadsheet 

KKKKKKKKKKKKKKKK http://pulsar.sitemynet.com 

.K Desktop Color Separation Specification Black Layer (usually an EPS file) 

.K2 Kar2ouche Storyboard File 

.K25 Kurzweil 2500 Sample 

Kodak DC25 Digital Camera File [XnView] 

.KAP MapInfo Sea Chart 

.KAR Karaoke MIDI File 

.KAU KeyAudit Software Audit 

.KB Borland C++ Keyboard Script 

Knowledge Pro Source Code 

.KBD Keyboard Script File Layout (various) 

(Programs produce these layout files but the operating system actually uses them.) 

.KBI Keirsey-Bates Temperament Sorter Index 

.KBM Reflection Keyboard Script File Layout 

Scala Keyboard Mapping (Musical scale editor) 

.KBP Keirsey-Bates Temperament Sorter Profile 

.KBR Keirsey-Bates Temperament Sorter Data 

.KCL Kyoto Common LISP Source Code 

.KCP Keychamp File 

.KDC Kodak Photo-Enhancer/Photogen File (raw bitmap image) [XnView] [IrfanView] 

.KDF Kinkos Photo 

.KED KEDIT Profile and Macro File (DOS-based version of IBM XEDIT) 

.KEX KEDIT Macro File 

.KEY Keyboard Macros 

Forecast Pro Datafile 

Program Security or Registration File (various) 

Sentry 2020 Encryption File 

Top Secret Crypto File 

DataCAD Icon Toolbar File 

Diablo II Key File 

.KF2 Max Payne Model File 

.KFA Dark Age of Camelot Animation 

.KFS Max Payne Model File 

.KFX KoFax Group 4 Image [XnView] 

.KGB Kremlin Encrypt File 

.KIC Kodak Image Compression File [TIFF Info] 

.KIF Autodesk AutoCAD Key Index File 

.KIT Raven Toolkit File 

.KIX KixTart Script (Win NT login scripts) 

.KIZ Kodak Digital Postcard File 

.KJV TheWord & Bible Companion King James Version Bible 

.KKW RoboHELP Keyword Help project Index File 

.KML Emu48 Emulator File 

.KMN SIL Hebrew Font System Keyboard 

.KMP Korg Trinity KeyMaP File 

.KNF Universal Flat Knitting Machine Pattern Design 

.KNO Personal Knowbase File 

.KOA Koala Paint [XnView] 

.KOS MicroType Pro Document 

.KPF Kapere (download manager, website grabber and more) 

.KPG Kai'S Power Goo Graphic 

.KPP SmartPad Toolpad 

.KPR KPresenter Slide Show

.KPS IBM KIPS Bitmap [XnView] 

.KQP Konica Quality Picture (Konica Photo Imaging on-line photo service) [XnView] 

.KR1 Kurzweil 2000 Sample (multi-floppy) 

.KRX Karaoke MIDI File 

.KRY Herolab Krypten 

.KRZ Kurzweil 2000 Sample 

.KS SOF Game File Log 

.KSC Korg Trinity Script 

.KSE Keepsake Studio Export File 

.KSF Korg Trinity Sample 

.KSH Prodigy Internet Registration File 

.KST Olivetti Olitext Plus Script File 

.KTK Kutoka's Mia (children's education) 

.KTT KeyText Data File 

.KUMAC Physics Analysis Workstation Macro File 

.KVB Klick-N-View Business Cards [Download] (Note: Developer site - http://www.knvs.com/ - did not exist 

when checked) 

.KWD KWord File (Linux Word Processor) 

.KWF Kartex (maps and GPS positioning) 

.KYB Keyboard Layout 

.KYE Kye Game Data 

.KYF Visual-Voice Mouth Movement Fil 

LLLLLLLLLLLLLLLLLLLLLL http://pulsar.sitemynet.com 

.L LEX Program File 

Link Instructions 

LISP Program File 

Cliq Accessories Datebook Lock File [Linux Suite PDF Description] 

.LA Lightscape Animation 

.LAB Mailing Labels 

NCSS Data File 

.LAD Daylon Leveller Animation Data 

.LAN ERDAS IMAGINE LAN Sensor Data 

.LAO EPSON Smart Panel File (unverified) 

.LAR Liquid Audio Player Registration File 

.LAT Crossword Express Lattice File 

.LAV Liquid Audio Player Voucher File 

.LAVS Liquid Audio Player Streaming Voucher File 

.LAY Applause Word Chart Layout 

Lightscape Layer State 

Track Builder Simulation Compiler Code (Railroad centralized traffic control simulations) 

MiTek Engineering File 

.LBA Liberty BASIC File 

.LBG dBase IV Label Generator 

.LBI Dreamweaver Library File 

.LBK VersaPro Local Logic Block Backup 

.LBL Labels (various) 

.LBM Electronic Arts Deluxe Paint [XnView] [IrfanView] 

XLib Linear Bitmap Graphic 

.LBO dBase IV Ordered Labels 

.LBR Compressed Archive File 

Lotus 1-2-3 Display Driver 

Omnis7 Application File 

.LBS Omnis Studio Application File 

.LBT Foxpro Label Memo 

.LBX Foxpro Label 

.LBXADD Libronix DLS Addin

.LBXALV Logos Bible Software Series X Passage In All Versions 

.LBXCBV Logos Bible Software Series X Copy Bible Verses Style 

.LBXCIT Libronix DLS Citation Format 

.LBXCMP Libronix DLS Company Information 

.LBXCOL Libronix DLS Resource Collection 

.LBXCTB Libronix DLS Custom Toolbar 

.LBXDAT Libronix DLS Data File 

.LBXDTP Libronix DLS Data Type 

.LBXLBK Libronix DLS License Backup 

.LBXLIC Libronix DLS Licenses File 

.LBXLLS Libronix DLS Resource (LLS Format) 

.LBXNOT Libronix DLS Notes 

.LBXOEB Libronix DLS Resource (OEB Format) 

.LBXPDF Libronix DLS Resource (PDF Format) 

.LBXPLN Logos Bible Software Series X Bible Reading Plan 

.LBXPLV Logos Bible Software Series X Parallel Bible Versions 

.LBXPRF Libronix DLS Preferences 

.LBXRAS Libronix DLS Resource Association 

.LBXRTP Libronix DLS Resource Type 

.LBXSHL Libronix DLS Shell 

.LBXUPD Libronix DLS Update Script 

.LBXVRS Logos Bible Software Series X Verse List 

.LBXWKS Libronix DLS Workspace 

.LBZ Leibniz Mathematical Word Processor 

.LCD CDspace CD Emulator 

.LCF Linker Control File 

.LCH PagePath Technologies LAUNCH! File 

.LCK MS Frontpage-related File [Buy Office XP at Shop.Microsoft] 

Paradox Lock File 

Adobe Pagemaker Database File 

.LCL FTP Software Data 

.LCN WordPerfect Dictionary File 

.LCS ACT! History File 

.LCW Lucid 3-D Spreadsheet 

.LD Telix Long Distance Codes 

.LD1 dBase Overlay File 

.LDA LaserData [XnView] 

.LDB MS Access Lock File [Buy Office XP at Shop.Microsoft] 

TrueVector Log Database 

Settler for Windows Temporary File 

.LDD Laser Dispatch Data 

.LDF LuraDocument File [XnView] [IrfanView] 

Geoworks Glue Library Definition 

MS SQL Server Transaction Log File 

.LDL Corel Paradox Delivered Library 

OzWin CompuServe E-mail/Forum Access Download Request 

.LDR LDraw Model File 

.LDS Laser Dispatch Script 

Trane Trace Load 

.LEG Legacy Graphic Format 

.LEN PlatePrep (output on flexo plates) 

.LEP Label and Envelope Designer Plus 2000 

.LES Learn Lesson File 

Mklesson Lesson File 

Logitech Entertainment Game Profile 

.LET Letter 

.LEV Worms Armageddon Map 

Worms World Party Map 

NetHack Level File 

.LEX Lexicon (dictionary file - many)

Lexmark Printer Install File 

.LFA LifeForm File 

.LFF LucasFilm Format [XnView] 

.LFL LucasFilm Library 

.LFM LifeForm File 

.LFP LifeForm File 

.LFQ LeechFTP Queue File [also see BitBeamer] 

.LFT Chiwriter Laser Printer Font 

3D Studio Loft File 

.LFXM FaceMail Text to Speech E-mail (Site Requires Application Download!) 

.LG Logo Procedure Definition 

.LGC Program Use Log File (for Windows Program Use Optimization) 

.LGF legal Eagle Text File 

.LGO MS Windows Logo Driver 

SuperFax Header/Footer Logo 

.LGP Logotron SuperLogo File 

.LGT Urban Chaos Game File 

The Sims (Maxis) Lighting File 

.LHA Compressed Archive File (LZH format; LHA.EXE) 

Compressed Archive File (LHARC.EXE) 

Compressed Archive File (LHARK.EXE) 

.LHS Literate Haskell Source File 

.LHW Compressed Amiga Archive File 

.LHZ LHA Compressed Archive File 

.LIB Program Library (diverse programmers' languages and installers) 

Greeting Card Library (e.g., KEY Greeting Card Designer) 

Library Used by an Application (e.g., EndNote Library) 

.LIC License File (various Shareware) 

.LID WinDVD File 

.LIF Compressed Archive File 

HP Logical Interchange Format File 

Homeworld Texture [XnView] 

.LIM Limit Compressed Archive 

.LIN AutoCAD Line Art 

VAX Program Listing 

.LIQ CollegeBAR Bartending Software Liquor Cabinet 

.LIS VAX Program Listing 

Structured Query Reporting (SQR) Output 

.LIT MS Reader EBook File 

.LIV LiveMotion SWF Movie (also called Bigshot Movie) 

.LIVEREG Symantec Norton Anti-Virus Update Session 

.LIVESUBSCRIBE Symantec Norton Anti-Virus Update Catalog 

.LIVEUPDATE Symantec Norton Anti-Virus Update File 

.LIX Libronix DLS Resource (LLS 2.x Index) 

Extend Simulation Library File 

.LJ Text File for HP LJ II Printer 

.LKO MS Outlook Express Linked Object [Buy Office XP at Shop.Microsoft] 

.LKS WinAmp Links File 

.LL3 LapLink III Document File 

.LLB LabView File 

.LLC LapLink Saved Connection File 

.LLP VersaPro Local Logic Block 

Digital Chart of the World Data File 

.LLT Digital Chart of the World Data File 

.LLX Laplink Exchange Agent 

.LM8 Picture File 

.LMD Tune Smithy List of Modes for a Musical Scale 

.LML LOGML File (Log Markup Language) 

.LMU RPG Maker 2000 (map included in an RPG game) 

.LNB Logomanager File

.LND 3D Landscape Data 

.LNG Diablo II File 

NRG SDR Language File 

.LNK Linker File 

Windows Shortcut File 

.LMP Quake File 

.LNS LinkStash Bookmark File 

.LOC Suppose Locations File 

.LOD Load File (various) 

.LOG Log File (many different programs - usually an ASCII text file) 

.LOGONXP LogonStudio File (customizes the WindowsXP Logon screen) 

.LOK FileWrangler/ZipWrangler/SecurDesk! Encrypted Archive 

.LP LP88 Linear Programming for the IBM-PC File 

Lightscape Preparation File 

FlexRip/B (Print Control and Press Behavior) 

.LP3 Hansen Software Label Printer (ver 1.0 - 2.1) 

.LP4 Hansen Software Label Printer (ver 3.x) 

.LPA LPA-View Laser Particle Analyser Test Analysis Software 

.LPB LP88 Linear Programming for the IBM-PC File 

.LPC Teko Printer Driver 

.LPD Helix Nuts and Bolts File (Helix Software now part of McAfee) 

Avery Label Pro 

.LPF Lytec's Direct Electronic Medical Claims ClaimsDirect 

.LPI Live Pictures 

.LPJ PASSOLO Localization Project (Software localization: translation, etc.) 

.LPN LVPlan - Planification of Low Voltage Aerial Distribution Networks 

.LPU PASSOLO Localization Project (Unicode) (Software localization: translation, etc.) 

.LQF Leech FTP Save Queue File 

.LQP Liquid Audio Player Passport File 

.LQT Winamp File 

Liquid Audio Player File 

.LRC Intel Video Phone File 

.LRF MS C/C++ Linker Response File 

.LRM Microsoft Encarta Class Server Learning Resource 

.LRP Linux Router Project Package 

.LRS WordPerfect Language Resource File 

Daylon Leveller Rendition Style (data used for visualizing heightfields) 

.LS Lightscape Solution File 

Freeware Dictionary Project Data File 

.LS1 OzWin CompuServe E-mail/Forum Access Library Listing 

.LSA Liquid Audio Player Skin File 

.LSC Tune Smithy List of Muscial Scales 

.LSD RPG Maker 2000 Saved Game File 

.LSE Nokia Audio Manager 

.LSF Streaming Audio/Video File 

Libronix DLS Resource (LLS 2.x) 

.LSG MS LocStudio Glossary 

.LSL Corel Paradox Saved Library 

Lotus Script Library 

Daylon Leveller Shape List (3D geometry for heightfield vector objects) 

.LSO Logic Audio File 

.LSP LISP Program File 

.LSQ VAX CRYSTALS Chemical Crystallogaphy File 

CalTech PaleoMag Least Squares Format 

.LSR Logos Library System 2.x Standard Reference Definition 

.LSS Legato Spreadsheet 

.LST Listing or List (e.g., packing list) 

PowerPoint File [Buy Office XP at Shop.Microsoft] 

Ingres Dump List File 

OzWin CompuServe E-mail/Forum Access Library Listing

1st Reader Keyboard Macro 

Oracle Spool File 

Family Tree Maker Error File 

.LSX Streaming Audio/Video Shortcut 

.LT2 Curious Labs Poser Lighting File 

.LTG Lasertank Bitmap Graphics 

.LTH Sierra Print Artist Letterhead 

.LTM Lotus Form 

.LTR Letter 

ACT! (DOS version) Letter File 

.LTT SDR99 Speech Recognition Task Lexical TREC Transcription 

HP Library and Tape Tools Log File 

.LU ThoughtWing Library Unit File 

.LUA Lua Source 

.LUL OzWin CompuServe E-mail/Forum Access Upload 

.LUP OzWin CompuServe E-mail/Forum Access Library Update 

.LVL Parallax Miner Descent/D2 Level Extension 

Lasertank Level 

Max Payne Uncompiled Level File [Added Info] 

.LVP Lucent Voice Player (Intuity Audix Multimedia Messaging System) 

LView Pro [XnView] 

.LVS Daylon Leveller Selection Mask 

.LVW Daylon Leveller View File 

.LW3 Lightwright File (spreadsheet/database to manage professional lighting design paperwork) 

.LWA LightWorks Archive (LWA) Material/Scene File 

.LWC Living Word Commentaries Bible File 

.LWD LotusWorks Text Document 

.LWF LuraWave-compressed Graphic File [XnView] [IrfanView] 

.LWI LightWorks Image [XnView] 

.LWO NewTek Lightwave® Object 

.LWP Lotus Wordpro 96/97 File 

.LWS NewTek Lightwave® Object Layout 

.LWV MS Linguistically Enhanced Sound File 

.LYR DataCAD Layer File 

Song Lyric File [On-line Guitar Archive] 

.LYT TurboTax Log File 

SignMaking Application Extension 

.LYX LyX (WYSIWYM document processor) 

.LZD Binary Difference File 

.LZH Compressed Archive File (LHARK.EXE) 

Compressed Archive File (LHARC.EXE) 

.LZS Compressed Archive File 

Skyroads Data File 

.LZW Compressed Amiga Archive File 

.LZX Compressed File 

MMMMMMMMMMMMMMMMM http://pulsar.sitemynet.com 

.M Matlab Function 

Brief Macro Source 

Mathematica File 

Limbo Interface Declaration (Inferno OS) 

Cliq Accessories Datebook Modification File [Linux Suite PDF Description] 

Desktop Color Separation Specification Magenta Layer (usually an EPS file) 

.M_U MazeGold Critical File Backup 

.M?? Ingres Modify Table/Index File (?? = Hex 00 to FF) 

.M$S MindStor Firmware Update File (M$A$W.M$S)

.M11 MASS11 Text File 

.M12 Proprietary Data Format for Interchange of Defense Form Data with Mil-Pac Technology Software 

Products (link is PDF file) 

S-BASIC File 

Hydrographs Synthesis Project File 


.M15 Apple MPEG-1 Video 

.M18 Accolade Golf Course File 

.M1A Apple MPEG-1/2 Audio 

.M1V MPEG-1 Video File 

.M2A Apple MPEG-1/2 Audio 

.M2P MPEG-2 Program Stream Format File 

.M2S MPEG-2 Audio and Video (system stream) 

.M2V MPEG-2 Video Only File 

.M3 Modula 3 Program File 

.M32 Dr.T MIDI File 

.M3A MPEG Archive Enhanced .M3U Playlist File 

.M3D 3D Animations Macro 

Corel Motion 3D Animation 

EverQuest File 

.M3S Myst III Exile Saved Game 

.M3U MP3 Playlist File [WinAmp ] [MattBatt iAM-player] 

.M4 UNIX M4 Preprocessor File 

.M75 Apple MPEG-1 Video 

.M8 Heretic II MipMap [XnView] 

.MA Maya File (ASCII) 

Diablo II Map File 

.MA3 Harvard Macro (Harvard Graphics taken over by Serif) 

.MAC MacPaint Bitmap Graphic [XnView] 

Macro (various) 

.MACP MacPaint Bitmap Graphic [XnView] 

.MAD MS Access Module Shortcut [Buy Office XP at Shop.Microsoft] 

Game Movie File (unverified) 

.MAF MS Access Form Shortcut [Buy Office XP at Shop.Microsoft] 

.MAG MPS Magro Paint System Graphic 

MS Access Diagram Shortcut [Buy Office XP at Shop.Microsoft] 

MAGIchan Graphic [XnView] 

.MAI VAX Mail 

.MAK Make File (compiler project file) 

.MAL AvantGo Connect-compliant Server Configuration File 

.MAM MS Access Macro Shortcut [Buy Office XP at Shop.Microsoft] 

.MAN Manual (often an ASCII text file) 

Windows 2000 Mandatory User Profile (C:/DOCUMENTS AND 

SETTINGS/USERNAME/NTUSER.MAN) 

.MANIFEST MS Visual Stylesheet for Windows Forms (Text file) 

.MAP Image 

Server-side Image Map (allows one to map link locations in a Web graphic) 

Color Palette 

AccView Network Map 

Atlas MapMaker Map 

DIV Game Studio Map [XnView] 

Fenix Map [XnView] 

Ingres Termcap Mapping File 

Poser 3D Map File 

WorldCraft Quake/Half-Life Game Level File 

Blood Game File Map 

Duke Nukem Game Level Data File 

...and many more games (too many to list) 

Linker Map 

Micrografx Picture Publisher Format Data

PROGNOSIS Map Document File 

.MAPIMAIL MS Outlook Express Mail File 

.MAQ MS Access Query Shortcut [Buy Office XP at Shop.Microsoft] 

.MAR MS Access Report Shortcut [Buy Office XP at Shop.Microsoft] 

VAX Macro Assembly Program 

Bibliographic Data Format (usually .MRC) 

.MAS Focus Master Data Definition 

MS Access Stored Procedures [Buy Office XP at Shop.Microsoft] 

Lotus Freelance Graphics Smartmaster File 

QuickCard File 

.MAT Sound File 

Pro/Engineer Material Properties File 

Matlab Variables Binary File 

MS Access Table Shortcut [Buy Office XP at Shop.Microsoft] 

Autodesk 3D Studio Max and Viz File 

Poser 3D Pose File 

.MAUD Sound File [Linux Player] 

.MAV MS Access View Shortcut [Buy Office XP at Shop.Microsoft] 

.MAW MS Access Data Access Page [Buy Office XP at Shop.Microsoft]a> 

.MAX Kinetix's 3D Studio MAX Scene 

Autodesk 3ds Max Scene File 

Maximizer Contact & E-business Program 

Paperport Scanned Image [Viewer] 

Max Source Code 

OrCAD Layout File 

.MAZ Hover Maze Data 

Division's dVS/dVISE File 

.MB Paradox Memo Holder 

Maya Binary (3D Software Maya Scenes) 

.MB1 Apogee Monster Bash Data File 

.MBD Multimedia Builder MP3 Authoring File 

.MBF MS Money Backup File 

.MBFS Stardent AVS X Image [XnView] 

.MBFAVS Stardent AVS X Image [XnView] 

.MBG Mailbag Assistant E-mail Archive 

.MBK dBase IV Multiple Index Backup 

VersaPro Motion Block Backup 

.MBM SymbianOS Multi BitMap Image (native EPOC image format) [XnView] 

.MBS Mailbag Assistant Script 

.MBT ecBuilder Template (Web site cataloging) 

.MBW MarketBrowser (investment charting/analysis) 

.MBX Mailbox Message File (Outlook v1-4 or Eudora and others) 

.MC MetaCard Script 

PlaySaver and PSEmuPro Memory Card Save and Single Game Save 

.MC1 MedCalc Data File (statistical research program) 

.MC8 Mastercam 8 File 

.MCA i-deas Web ACCESS File 

.MCC Mathcad Configuration 

Mylar City Character Editor 

Dialer10 Calling Card 

Monu-Cad Pro CAD File 

VectorWorks/MiniCAD File [Viewer] 

Incite Media Assistant File 

.MCD Mathcad Document 

Craig McDowall.com NotePad 

Monu-Cad Pro CAD File 

Bleem! Memory Card Save 

.MCF Mathcad Font 

Meta Content Format File (describes a Web site) [Process description]

Master Command File 

TMPGEnc Template (Multimedia Container Format File) 

.MCH Macromedia Xtra Cache File 

.MCI Media Control Interface Command Set 

.MCL Multimedia Manager Collection File 

Macro Command Language (Symbol handheld terminals) 

.MCP Mathcad Printer Driver 

Capsule Application Script 

.MCQ McAfee Quarantined File 

.MCR DataCAD Keyboard Macro File 

PlaySaver and PSEmuPro Memory Card Save and Single Game Save 

CuteFTP Script 

.MCS MathCAD Format File 

.MCT Musicator 

.MCW MacWrite II Macintosh Text File 

.MCX Graphic File 

.MD Compressed Archive File 

Teknical eLearning Objects Meta-Data File (stores info on related file) 

.MD1 Gear CD Suite File 

.MD5 MD5summer (generates and verifies md5 checksums) [MD5 Generator] [fsum Checksum Utility] 

.MDA MS Access Add-in 

MS Access 2 Workgroup 

.MDB MS Access Database 

MS Access Application 

Mediator Multimedia Data 

PTC Pro/MECHANICA File (test/optimize designs for structural, dynamic, thermal and durability 

performance) 

.MDE MS Access Database File 

.MDF Menu Definition File 

MS-SQL Master Database File 

Accelio Capture Classic (JetForm) Filler (JetForm Corp became Accelio 12 Sep 2001) 

I-deas Master Drafting Machine Data File 

.MDL Digitrakker Music Module (by n-FaCToR) 

Rational Rose 

Quake Model File 

3D Design Plus Model 

Simulink Simulation Model 

ASTi Model Builder File 

CA-Compete! Spreadsheet 

Half-life Model [XnView] 

Moray Model (wireframe modeller supporting POV-Ray 3.1) 

Symbian OS MIME Type Library 

.MDM Telix Modem Definition 

.MDMP WinXP Trouble Report (extension is added to file sent) 

.MDN MS Access Blank Database Template [Buy Office XP at Shop.Microsoft] 

.MDO MS Internet Information Server Configuration Backup 

.MDP MS Developer Studio Project 

.MDR FaxTalk Modem Doctor Modem Report File 

.MDS Media Description File [Fantom CD Emulator] 

.MDT MS Access Add-in Data [Buy Office XP at Shop.Microsoft] 

MS ILink Incremental Linker Data Table 

.MDW MS Access Workgroup Information [Buy Office XP at Shop.Microsoft] 

.MDX dBase IV Multiple Index [File Structure] 

Avery Label Pro Re-Index File 

.MDZ MS Access Wizard Template [Buy Office XP at Shop.Microsoft] 

.ME Information (e.g., READ.ME) 

.MEA Meazure File (screen measurement and capture utility) 

.MEB WordPerfect Macro Editor Bottom Overflow File 

.MED WordPerfect Macro Editor Delete Save 

OctaMED Tracker Module

.MEL Ericsson Phone Melody 

Maya Embedded Language Script 

.MEM WordPerfect Macro Editor Macro 

Memory File of Variables 

MS FoxPro Memory Variable Save File 

.MEN Menu 

.MEQ WordPerfect Macro Editor Print Queue 

.MER WordPerfect Macro Editor Resident Area 

Data Interchange Format 

.MES Message File 

WordPerfect Macro Editor Work Space 

.MET WordPerfect Macro Editor Top Overflow File 

Presentation Manager Meta File 

OmniPage Document 

eDonkey2000 File 

.METHODS Likely a text file (e.g., README.METHODS) 

.MEU DOS Shell Menus 

.MEX Matlab Executable Command 

WordPerfect Macro Editor Expound File 

mexReader Multimedia File 

.MEZ RealArcade Game Information 

.MF MetaFont Text File 

.MFA MS Site Server 3.0 Report Definition 

.MFF MIDI File Format 

.MFG MediaForge Runtime Player 

.MFM VTeX Multiple Master Font Metrics (a variant of the Adobe Font Metrics (AFM) format?) 

.MGC MGCSoft Equation Editor File 

.MGCF MagicInstall Compressed File 

.MGD Master Grade Gradebook 

.MGF Image File 

Micrografx Font 

Materials and Geometry Format File 

.MGL MosASCII Graphics Library 

MS Age of Kings File 

.MGM MGCSoft Equation Editor Macro File 

.MGR MGR Bitmap [XnView] 

.MGX Micrografx Picture Publisher Clipart 

.MGZ Metal Gear Solid Archive [Dragon UnPACKer] 

.MH Graphic File 

.MHG Multimedia File 

.MHK Riven Movie Data File (Mohawk Archive) 

.MHP MS Home Publishing Project 

.MHT MS MHTML Document (Archived Web Page) 

.MHTML MS MHTML Document (Archived Web Page) 

.MI Miscellaneous 

CoCreate CAD File 

.MIB Management Information Base File (SNMP Management Programs) 

.MIC MS Image Composer File 

.MID MIDI File [IrfanView] 

.MIDI MIDI File [IrfanView] 

.MIF MIDI Instrument 

Adobe FrameMaker Interchange Format 

Software License Tracking Tool (CERTAUTH.MIF) 

MapInfo Interchange Format File 

MicroHof .MIF Assembler File 

Image Magick File [XnView] 

.MIFF Image Magick File [XnView] 

.MII MicroStat II Data File 

.MIL Group 4 Fax File 

Micro Illustrator Uncompressed Graphic [XnView]

.MIM Multi-Purpose Internet Mail Extensions (MIME) File [MIME] 

.MIO mexReader Multimedia File 

.MIP Paint Shop Pro Multiple Image Print File 

.MIS Delta Force Land Warrior Mission [Fan site] 

Tribes 2 Game File 

MagicInstall Installation Script (Under development Feb 2002) 

.MIX Power C Object File 

Multilayer Picture File (MS PhotoDraw 2000 & MS Picture It!) 

Don Knuth's MIX Emulator 

Command & Conquer Movie/Sound File 

Techno eJay Music Mix File 

OzWin CompuServe E-mail/Forum Access Index File 

.MJ MovieJack DVD Ripper File 

.MK Make File 

.MKD Malz++Kassner CAD5 Drawing 

.MKE Make File 

.MKI Picture File 

.MKL Malz++Kassner CAD5 Drawing Library 

Créatoria 

.MKS Tact Data 

.ML3 Milestones 3.x Project 

.ML6 PowerPoint Milestone File 

.MLB Macro Library 

.MLD Multilizer Dictionary 

Polyphonic Ringtone File for Phones 

.MLI Encyclopedia Media List 

3D Studio's Material-Library File 

.MLK Sierra Mastercook File 

.MLM Novel Groupwise E-mail File 

.MLS Miles Sound Tools Compressed DLS 

.MM Macro Mania Macro 

Multimate Advantage File 

Lightscape Material Map 

.MMB MultiMedia Builder 

Oracle Forms Menu Binary Source Code 

.MMC Media Catalog 

MSoffice Media Content (MS OfficeXP) 

.MME Multi-Purpose Internet Mail Extensions (MIME) File [MIME] 

.MMF Meal Master Format 

MS Mail File 


.MMI Memo Open Client 

.MML Mail Meta Language 

.MMM Animation MS Multimedia Movie 

MacroMind Directory RIFF/RMMP Format Movie 

.MMO RapidFile Memo Writer 

.MMP MindManager Map File 

Gammadyne Mailer Project File 

CoCo Systems VisiMap 

Bravado Board Video Output Format 

.MMPBT MindManager Branch Template File 

.MMPT MindManager Template 

.MMS Miles Sound Tools (Midi+DLS/MLS) 

.MMSCRIPT MindManager Script File 

.MMT Nimbus 7 SAMS Data File (monthly mean retrieved temperatures) 

CoCo Systems VisiMap 

.MMV Sony MovieShaker File 

.MMW Microsoft Media Content 

.MMX Command & Conquer Red Alert 2 Map File 

Oracle Forms Compiled Menu

.MMZ MusicMatch Theme File 

.MN2 Descent2 Mission File 

.MN3 Descent3 Mission File 

.MN4 Microsoft Money Database (older version) 

.MNB MuPAD File 

.MNC My Notes Center File 

.MND AutoCAD Menu Program File 

MNI Mandelbrot for Windows 

.MNG Animation Shop Animation 

DeLorme Map'n'Go Map 

Multi-image Network Graphic [XnView] 

.MNO Monopoly Saved Game 

Macromedia Design Notes 

.MNR AutoCAD Compiled Menu File 

.MNS AutoCAD ASCII Menu File 

.MNT Foxpro Menu Memo 

.MNU Menu File (various) 

HP NewWave Advanced Macro 

.MNW Menu File (various) 

.MNX AutoCAD Compiled Menu File 

Foxpro Menu 

.MNY MS Money File 

.MOB Device Definitions 

.MOD Music File (various) 

Model File (various) 

Modula-2 Program File 

ProModel Optimization Software Suite Model 

Windows Kernel Module 

Amiga and PC Tracker Module 

MS Multiplan Spreadsheet 

Monarch File (data mining) 

.MODEL Catia File 

.MOL MDL Molfile (MIME type chemical/x-mdl-molfile) [Requires Chime Plug-in] 

Easy Palette Object Library 

.MOM SPEFO Stellar Spectra Analysis File 

.MON ReadMail Monitor (UNIX) 

.MOP Mopac Input File (MIME type chemical/x-mopac-input) 

.MOR Poser 3D Morph Target File 

.MOV QuickTime Video Clip [IrfanView] 

Apple QuickTime Audio 

AutoCAD AutoFlix Movie 

.MOVERADDIN Mover (Inventory Management) Add-in 

.MOVERBACKUP Mover (Inventory Management) Backup Set 

.MOVERCONFIG Mover (Inventory Management) Configuration 

.MOVERDB Mover (Inventory Management) Database 

.MOVERREG Mover (Inventory Management) Registration Info 

.MOVERTEMPLATE Mover (Inventory Management) Template 

.MOVIE Video 

.MOX Extend Simulation Model File 

.MOZ Netscape Temp File 

.MP Multiplan File 

Maya Personal Learning Edition File 


with E] 

.MP+ MpegPlus Audio File (replaced by .MPC) 

.MP1 MPEG Audio Stream, Layer I 

.MP2 MPEG Audio Stream, Layer II 

.MP2V MPEG Audio Stream, Layer II 

.MP3 MPEG Audio Stream, Layer III [IrfanView] 

SHARP MZ-series Emulator File

.MP4 iVAST MPEG-4 (hold BIFS-Binary Information For Scene representation) [MPEG-4 Industry Forum] 

.MPA MPEG Audio Stream, Layer I, II or III 

Palm Memo File 

.MPB TruVideo Video-only MPB Stream [Win Media Player Plug-in] 

.MPC MS Project Calender 

MP3 Collector Collection Manager File 

VersaPro Compiled Motion Block 

Musepack Audio File (new format replacing .MP+) 

.MPCB ReliaSoft MPC 3 (MSG-3 Aircraft Maintenance Program Software) 

.MPD SCSI MiniPort Driver 

MS Project Database File 

.MPDEX MPdex MP3 Database Utility 

.MPE MPEG Movie Clip 

.MPE.EXE MP3 Digital Player Wrapper 

.MPEG MPEG Movie 

.MPF MS Design Gallery 

MosASCII Project Workspace File 

.MPG MPEG Animation [IrfanView] 

MPEG 1 System Stream 

.MPGA Mpeg-1 Layer3 Audio Stream 

.MPH MS Publisher 

.MPJ RoboHTML Project 

Mountain Video Editing File (Atari) 

.MPK Augmented MS-Project File 

.MPM WordPerfect MathPlan Macro 

Max Payne MOD Archive [Added Info] 

.MPNT MacPaint Bitmap File [XnView] 

.MPO Augmented MS-Project File 

.MPP MS Project File 

CAD Drawing File 

.MPQ Blizzard Game Data File 

(also other games) 

.MPR Foxpro Program 

Westwood Studios Game File (e.g., Red Alert, et.al. - should be a text file) 

FileMaker Spelling Dictionary 

.MPS Multimedia File 

MPEG-1 Audio and Video File (system stream) 

Casio PDL Pocket Streets Map (Microsoft product - see just below) 

MS Pocket Streets Map File 

Max Payne Saved Game 

Garmin Mapsource GPS Mapping Interface 

MySweetNix! (change MSN Messenger Service nickname every n seconds) 

.MPT MS Project Template File 

Multipage TIFF Bitmap 

.MPV MS Project View 

MPEG-1 Video File 

MyPhotoZip File (compression for image files) 

.MPV2 MPEG Audio Stream, Layer II 

.MPW MosASCII Project Workspace File 

.MPX Foxpro Compiler Menu 

MS Project Export File 

RCA/Lyra Handheld MP3 Player File (secure MP3 format that only plays in this player) 

.MPZ MyPhotoZip File (compression for image files) 

.MRB MS C++ Multiple Resolution Bitmap Graphic 

.MRC MIRC Script File 

Bibliographic Data Format 

.MRF Marks Russel File [XnView] 

.MRI MRI Scan 

.MRK Informative Graphics Markup File 

.MRO SharpEye Music Reader File

.MRS WordPerfect Macro Resource File 

.MRW Minolta Diamage RAW Graphic (use view software supplied with camera) 

.MS Checksum File for Anti-Virus 

.MS1 OzWin CompuServe E-mail/Forum Access Message File 

.MS3D MilkShape 3D Model 

.MSA Magic Shadow Archive 

.MSC Microsoft Common Console Document 

MS C Makefile 

.MSF Multiple Sequence File (biomedical analysis) 

.MSG Program Message 

OzWin CompuServe E-mail/Forum Access Message File 

MS Mail Message 

.MSH MASH (The Microsoft Agent Scripting Helper) 

.MSI Windows Installer File (associates components with features and contains installation control info) 

.MSK Autodesk Mask File 

PaintShop Pro Mask File [XnView] 

.MSM MultiSIM Circuit Diagram 

.MSN MS Network Document (possibly nicknames) 

Descent Mission File 

.MSO MS Word OLE Web Page Storage Stream [Buy Office XP at Shop.Microsoft] 

MS FrontPage File [Buy Office XP at Shop.Microsoft] 

Math Script Object File 

.MSP MS Paint Graphic File [XnView] 

Windows Installer Patch 

Magix Music Studio File 

.MSPX Related to Microsoft's .NET (still researching) 

.MSR OzWin CompuServe E-mail/Forum Access SYSOP File 

.MSRCINCIDENT MS Remote Assistance Request 

.MSS Manuscript Text File (various) 

Game Score 

.MSSYTLES Windows Visual Style File 

.MST Minispecification 

DATAIR Pension System Master File 

Windows SDK Setup Transform Script (contains mods to apply to package during installation) 

ChemFinder Chemical Structure Index 

Visual Test Source File 

.MSW Word Text File [Buy Office XP at Shop.Microsoft] 

.MSWMM Microsoft Windows Movie Maker Project (Part of WinME & XP) 

.MSV Sony Memory Stick Format 

.MSW MS Word Text File 

.MSX Compressed CP/M File Archive 

.MT2 MadTracker File (32-bit tracker for Windows) 

.MTA MS Flight Simulator Maintenance File 

.MTB MINITAB Exec File (a macro file) 

.MTD Digital Sheet Music [Viewer] 

.MTE MadTracker Envelope File (32-bit tracker for Windows) 

.MTF Darkstone Archive [Dragon UnPACKer] 

MicroSurfer File (Link manager/accelerator) 

.MTH Derive Math File 

.MTI MadTracker Instrument File (32-bit tracker for Windows) 

.MTK Matrikon Software License File 

.MTL MathLook File 

.MTM MultiTracker Music Module 

.MTP L&H Power Translator Pro 

MadTracker Pattern File (32-bit tracker for Windows) 

.MTS Viewpoint iPix File 

MadTracker Sample File (32-bit tracker for Windows) 

.MTX Viewpoint iPix File 

.MTV MTV Ray-tracer [XnView] 

.MTW Minitab Data File

.MTX Temporary File often used by a browser or TWAIN device 

MadTracker Extension File (32-bit tracker for Windows) 

.MU Quattro Menu 

.MUC Music Collector Collection Manager File 

.MUF ProtoMuck Multi User Forth Program 

.MUL Ultima Online Game 

.MUP Music Publisher File 

.MUS MusicTime Audio File 

Finale Music Score 

Harmony Assistant, Melody Assistant, Myriad Music plug-in, Melody Player 

.MV Miva Script 

.MV3 Oozic 3D MusicVideo 

.MVA Matrox Video Card Driver 

.MVB Database 

MS Multimedia Viewer File [Viewer Download] 

Note: The viewer download is old. Don't overwrite any new files with old. 

.MVC Music Collector Collection Manager File 

.MVD MicroDVD DVD Movie 

.MVE Interplay Video File [Descent2] 

.MVF Movie Stop Frame File 

.MVI AutoCAD Movie Command File 

.MVW Saber LAN Log File 

.MW4 MechWarrior 4 Map 

.MWD Photo Soap2 File 

.MWF ProMotion Animation 

Autodesk MapGuide Author Map Window File 

.MWM Mail Warrior File 

.MWP Lotus Wordpro 97 Smartmaster File 

MegaWorks Pack File [Dutch] 

.MWS Maple Spreadsheet 

.MWV MovieWorks File 

.MX3 Bitbop Tuner Locked Sound File 

.MXD GIS Project File (map information) 

.MXE Macro Express 

Mindex Effect Album 

.MXI Proteus File (personal light and sound stimulation system) 

Macromedia Extension Information 

Mindex Indices file for Indexed Images 

.MXM MS Project/Outlook Team Assign Task 

Mindex Master Index File for a Category 

.MXP Macromedia Extension Manager 

ArcReader Published Map 

.MXT MS C 

ArcMap Map Template 

.MYD MySQL Data File 

.MYI MySQL Data File 

.MYDOCS MyDocs Drop Target 

.MYP Make Your Point Presentation 

.MYS Myst Saved Game 

.MYW MyWorld Education Drawing 

.MZ MOZART Music Document 

.MZB MegaZeux Board 

.MZE MidiMaze File (Atari Game) [Maze Utilities] 

Maze Creator File 

.MZF SHARP MZ-series Emulator File 

.MZP MOZART Percussion File 

.MZQ SHARP MZ-series Emulator QuickDisk File 

.MZS SHARP MZ-series Emulator File 

.MZT MOZART Template File 

SHARP MZ-series Emulator File

.MZX MegaZeux World 

NNNNNNNNNNNNNNNNNN http://pulsar.sitemynet.com 

.N1E OM2 OMALI NENA Encrypted Document Version 1 


.N2P Net2Phone File 



.N64 Nintento 64® Emulation ROM Image 

MiMiX Emulator 

.NA2 Netscape Communicator Address Book 

.NAB Novell Groupwise Address Book 

Netscape Communicator Address Book 

.NAD Noder File (Polish) 

.NAI WinINSTALL File 

.NAM MS Office Name File (often DISPLAY.NAM - text description) 

.NAN Nanoscope File 

.NAP NAP Metafile Vector Image 

Napster Music Security Definition File [How It Works] 

EnerGraphics VideoShow File 

Electrical Network Analysis and Planification 

.NASB TheWord & Bible Companion New American Standard Bible 

.NAV MSN Application Extension 

.NB Nota Bene Text File 

Mathematica Notebook 

.NC Graphics File 

Numerical Control Machine Instructions 

.NCB MS Developer Studio File 

.NCC Computer Numeric Control File 

NetControl V1 1999 (freeware network health probe) 

.NCD Norton Change Directory 

NTI CD-Maker File 

CoverDesigner [XnView] 

.NCF Netware Command File 

Lotus Notes Internal Clipboard 

.NCH Outlook Express Folder File [Buy Office XP at Shop.Microsoft] 

On Hold Message/Music File 

.NCR NCR Image [XnView] 

.NCT CoverDesigner [XnView] 

.NDB Intellicom Network Database 

.NDF NeoPlanet Browser File 

.NDL Lotus Notes 

.NDO 3D Low-polygon Modeler 

.NDS Indiana Jones and the Infernal Machine Saved Game 

.NDX Index (usually dBase compatible) [File Structure] 

.NE1 OM2 OMALI NENA Document Version 1 




.NEB Nortec H.E.L.P. (humidity calculations) 

.NED MSN Application Extension 

.NEF Raw Graphic File Format for Nikon Digital SLR Cameras [XnView] 

.NEO Neochrome (ST & TT) [XnView] 

.NES Nintendo Entertainment System ROM Image 

.NET Network Configuration 

OrCad Netlist Output File

.NEW New Information (e.g., WHATS.NEW) 

.NEX Nexcon System File (Nexcon is a shell replacement) 

Neurological Data for Statistical Analysis [Neuroexplorer (and others)] [File Format & More Info] 

.NFF WorldToolKit Neutral File Format [Format] 

.NFO Folio Infobase 

Text File [Open in text editor] 

MS System Info File (XML format) 

Warez Group Info File 

.NG Norton Guide Online Documentation 

.NGF Enterasys Networks NetSight Generated Format File 

.NGG Nokia Group Graphics [XnView] 

.NGS NGSSniff File 

.NH NetHack Defaults File (defaults.nh and/or NHAccess.nh) 

.NHF Nero HFS-CD Compilation 


.NICK Office Data File 

.NIL Norton Icon Library File 

.NIF NetImmerse File Format 

.NITF National Imagery Transmission Format [XnView] 

.NIV TheWord & Bible Companion New International Version Bible 

.NJP njPipes Compiler File (generally java or NetRexx code) 

.NJX NJStar Document 

.NK2 Office Data File 

.NKJV TheWord & Bible Companion New King James Version Bible 

.NLB Oracle 7 Data 

.NLD ATI Radeon Video Driver File 

.NLF ReliaSoft Weibull++ 6 (Life Data Analysis Software) 

.NLM Netware Loadable Module 

LogoManager for Nokia Phones (format for Nokia phone images) [XnView] 

.NLS Code Page National Language Support 

.NLTRACK NoLimits Rollercoaster Simulator Track File 

.NLU Norton Live Update E-Mail Trigger File 

.NLX FormWorx Form 

.NMA Normalised Extinction Corrected Differential Photometry 

.NMD SwordSearcher File 

.NMI SwordSearcher File 

.NMO Virtools Behavioral Objects 

.NMS Numega Softice's Loader File (includes debugging info) 

Virtools Graphical Scripts 

.NNB newnovelist Story Outline 

.NNI ANNI Artificial Neural Network Investing 

.NOB VersaPro Word Exchange File 

Vampire: La Mascarade Archive [Dragon UnPACKer] 

.NOD Noder File (Polish) 

.NOL Nokia Operator Logo [XnView] 

.NON Star Wars - Tie Fighter Mouse Options 

.NOR ATI Radeon Video Driver File 

.NOT ActiveNote Post-It-Notes 


.NOW Text File (e.g., README.NOW) 

.NP Nokia Planner Project Schedule 

Cliq Accessories Notepad Text [Linux Suite PDF Description] 

.NPA ReliaSoft Weibull++ 6 (Life Data Analysis Software) 

.NPD Noder File (Polish) 

.NPI dBASE Application Generator Source 

.NPK MikroTik RouterOS Upgrade Package 

.NPL DART Pro 98 Noiseprint Info 

.NPM Nokia Picture Message 

Neopaint Mask [XnView] 

.NPT DART Pro 98 Noiseprint Archive Import

.NRA Nero Audio-CD Compilation 


.NRB Nero CD-ROM Boot Compilation 


.NRG Norton Registration Entries 

Nero CD-Image 



.NRH Nero Hybrid CD-ROM Compilation 


.NRI Nero ISO CD-ROM Compilation 


.NRL iManage File 

.NRM Nero Mixed-Mode-CD Compilation 


.NRSV TheWord & Bible Companion New Revised Standard Version Bible 

.NRT Nokia RingTone 

.NRU Nero UDF/ISO CD-ROM Compilation 


.NRV Nero Video-CD Compilation 


.NS2 Lotus Notes 2 Database 

.NS3 Lotus Notes 

.NS4 Lotus Notes Database 

.NS5 Lotus Notes Domino File 

.NSB Novaschem School Schedule 

.NSC Noder File (Polish) 

Windows Media Station File (used to gather info for WMP to play content) [Security patch] 

.NSD NRG Site Database 

.NSF Lotus Notes Database 

NES Sound File [Winamp (plugin), Meridian, Nosefart] 

.NSG Lotus Notes 

.NSH Lotus Notes 

.NSI Nullsoft Install System Script 

.NSO NetStudio Easy Web Graphics File 

.NSP Multi-Speech Sound File 

.NST Audio File 

Noise Tracker Music Module 

.NSX HiPer-Six Index File 

.NT Windows NT Startup File 

.NTF Lotus Notes Database Template 

.NTO NTOScanner (TCP port scanner) 

.NTP Neato CD Labels 

.NTR Netrun Executable Text File 

.NTS Norton Tutorial 

Netsend Executable Text File 

.NTW LVNet - Low Voltage Networks Analysis 

.NTX Clipper Index 

.NTX Web Audio File 

Network Terminal Accelerator Adapter Card Configuration Information 

CARIS Marine Navigation Info 

.NTZ InVircible Directory Integrity Information 

.NUF Procomm Plus New User Message 

.NUL Grand Theft Auto (Playstation 2) Game File 

.NUM Guitar Chords in Nashville Numbering System Format [On-line Guitar Archive] 

.NV Juno Access Number Info File 

Visicontrol MVS-20 Non-Volatile Memory Backup File (Ver

Visicontrol MVS-20 Non-Volatile Memory Backup File (Ver 2.x) 

.NW NoteWorthy 2 File 

Unoffical Graal Level 

.NWC Noteworthy Composer Song File 

.NWS MS Outlook Express News File [Buy Office XP at Shop.Microsoft] 

Newsmaster or Newsmaster II Data File 

.NXT NeXT Sound File 

OOOOOOOOOOOOOOOOO http://pulsar.sitemynet.com 

.O Object File (various) 

.O$$ Output File (temporary usually) 

.O01 Typhoon Voice File 

.OAB MS Outlook Address Book [Buy Office XP at Shop.Microsoft] 

.OAZ NetFax Manager OAZ Fax File [XnView] 

.OB IMB LinkWay Object File 

.OB1 OzWin CompuServe E-mail/Forum Access Saved Outbox File 

.OBD MS Office Binder [Buy Office XP at Shop.Microsoft] 

.OBE MS Out Of Box Experience 

.OBJ Relocatable Object Code (various) 

Lightwave Object 

.OBN Oberon-2 Module Source File 

.OBPACK ObjectBar Object (customizes the Windows Taskbar) 

.OBTHEME ObjectBar Theme File (customizes the Windows Taskbar) 

.OBR Borland C++ Object Browser Data File 

.OBS ObjectScript Script 

OzWin CompuServe E-mail/Forum Access Saved Outbox File 

.OBT MS Office Binder Template [Buy Office XP at Shop.Microsoft] 

.OBV ObjectScript Visual Interface 

.OBZ MS Office Binder Wizard [Buy Office XP at Shop.Microsoft] 

.OCA Control Typelib Cache 

.OCF Object Craft File 

OM2Cipher File 

.OCM AOL Advertising Control Files (advert.ocm & admin.ocm) 

Internet Odyssey 2 Update 

.OCP Advanced Art Studio [XnView] 

Offline Commander Project File 

.OCR FAXGrapper FAX Text File 

.OCT Radiance Octree Format 

.OCX Object Linking and Embedding (OLE) Control Extension 

.OD1 Omnis5 Database File (also .OD2, .OD3, etc.) 

.ODC MS Office Data Connection 

.ODCCUBEFILE MS Office Data Connection 

.ODCDATABASEFILE MS Office Data Connection 

.ODCNEWFILE MS Office Data Connection 

.ODCTABLEFILE MS Office Data Connection 

.ODE MS Office Object Data Embedding File [Buy Office XP at Shop.Microsoft] 

.ODF Open Document Interchange 

BattleZone Cartographers Guild File 

.ODL Visual C++ Type Library Source 

.ODS MS Outlook Express Mailbox [Buy Office XP at Shop.Microsoft] 

.OEM Text Listing of Supported OEM Devices for WinNT (TXTSETUP.OEM) 

OEM Data Used During Device Install (various) 

.OF LessDATA Video System OneFile File (contains both video and/or audio) 

.OFC Open Financial Connectivity File 

.OFD ObjectView Form Defintion 

.OFF Vector Graphic (Object File Format) 

3D Mesh Object File Format 

.OFM Adobe Font

OmniForm Form File 


.OFN MS Office FileNew File [Buy Office XP at Shop.Microsoft] 

.OFT MS Outlook Item Template [Buy Office XP at Shop.Microsoft] 

.OFX Open Financial Exchange File (used by programs like Quicken) 

Olicom Fax [XnView] 

.OGG Ogg Vorbis Codec Compressed WAV File 

Origin File 

.OGM Ogg Vorbis Compressed Video File 

.OGS Origin File 

.OIF QuickBase Web-sharable Database Interchange File 

.OIL Open Image Library Format [XnView] 

.OKS OKScript File (Windows scripting tool) 

.OKT Oktalyzer Tracker Module 

.OLB Object Library 

.OLD Old Version (sometimes used as a backup indicator) 

.OLE Object Linking and Embedding (OLE) Object 

.OLI Olivetti Text File 

.OM Omicron Compiler File 

.OMF Open Media Format File (Developed by Avid and can contain images, video, etc.) 

.OMG OpenMG Jukebox (Sony's proprietary ATRAC3 codec) 

.OMN Omnipotent, Inc. Collection File (ASCII text file relating to explosives, etc.) 

.OMS Omega Downloader Configuration File (text) 

Briggs Softworks Order Maven (Order form creation utility) 

Macintosh MP3 Music Format 

.OND Lotus Notes-related File (small Notes database with one document; OND=One Note Database) 

.ONX Onyx Graphics Postershop File 

.OOM Shroom Swap File 

.OP2 Outpost 2 Saved Game [Supporting Site] 

.OPC Beta 44 Job File 

Omron OPC Client File (Factory Automation) 

MS Upgrade Control File (ASCII text file) 

.OPF Flip Album File 

.OPJ OrCad Project File 

Origin File 

.OPL Psion Organiser Programming Language Source File 

.OPN Exact Active Options 

.OPO OPL Output Executable File 

.OPS MS Office Profile Settings File [Viewer] 

.OPT QEMM Optimize 

Options 

MS Developer Studio File 

Segue SilkTest Option Set File (previously QA Partner or QualityWorks - ASCII text file) 

.OPX MS Orgchart Organization Diagram 

Exact Inactive Options 

OPL Extension DLL 

.OQY MS Excel OLAP Query File [Buy Office XP at Shop.Microsoft] 

.OR2 Lotus Organiser 2 File 

.OR3 Lotus Organiser 97 File 

.ORA Oracle 7 Configuration 

.ORC MIDI File 

Oracle 7 Script 

.ORG Lotus Organiser File 

Origin File 

.ORI Original 

.OSC Remote Installation Services Client Installation Wizard File 

(OSChooser Markup Language - MS KnowledgeBase Article Q268325) 

.OSF ICZ OriSAFE (file encryption and signing through MS CryptoAPI) 

.OSG OSG321 Software Application Data File 

.OSS MS Office Saved Search [Buy Office XP at Shop.Microsoft]

.OST MS Exchange/Outlook Offline File 

.OTB Nokia Phone Graphics Editor [XnView] 

.OTF Open Type Font Format 

.OTL NoteTab Outline 

Z-Soft Type Foundry Font 

.OTP Origin File 


.OTS OtsJuke Sound File 

.OTX Olivetti Olitext Plus File 

.OU! OzWin CompuServe E-mail/Forum Access Outbound Messages Online 

.OUT Outlines or Output File (various) 

OzWin CompuServe E-mail/Forum Access Outbound Messages 

.OV1 Program File - Overlay 



.OVA Sierra Web Studio Graphic 

.OVD ObjectVision Datafile 

.OVE Cakewalk Overture Score 

.OVL Program File - Overlay 

.OVR Program File - Overlay 

.OVW Cool Edit Pro Overview File 

DIANA Overview File 

Cubase .WAV File Image 

.OWD OpenWire Project (Delphi, C++ Builder and Kylix graphical design library) 

.OWS Web Studio 2 Project File 

.OXL OMEGA Product Suite File (Predictive data mining) 

.OZM Sharp Organizer Memo Bank 

.OZP Sharp Organizer Telephone Bank 

PPPPPPPPPPPPPPPPP http://pulsar.sitemynet.com 

.P PASCAL Program File 

ReaGeniX Code Generator Application Parameter File 

Applause Picture 

Progress 4GL Program 

Cliq Accessories Datebook Permissions [Linux Suite PDF Description] 

.P01 IsoBuster File 

.P01, .P02, ... particularly in binary newsgroups (See .PAR below) 

.P10 Tektronix Plot 10 Drawing 

Certificate Request 

.P12 Personal Information Exchange File 

.P16 ProTracker Studio Music 

.P22 Patch22 Patch File 

.P3 Primavera Project Planner 

.P34 P34 Lotto File 

.P64 Picasso 64 [XnView] 

H.261 Encoded Video File [Player] 

.P65 Pagemaker 6.5 File 

.P7B PKCS #7 Certificate 

.P7C Digital ID File 

.P7M PKCS #7 MIME Message (see Section 3.2 in RFC 2311 [MIME] 

.P7R Certificate Request Response 

.P7S PKCS #7 Signature 

.PA Print Artist 

.PA1 PageAhead Worktable 

.PA2 STABCAL (stability calculation for aqueous systems) File

.PA3 STABCAL (stability calculation for aqueous systems) File 

.PA5 STABCAL (stability calculation for aqueous systems) File 

.PAB MS Personal Address Book 

.PAC SB Studio II Package 

Stad Image [XnView] 

Desperados: Wanted D|A Archive [Dragon UnPACKer] 

.PAD Telemate Keypad Definition 

Scanner Output [IrfanView] 

(To edit try renaming to .JPG -- these are often JPEG files.) 

Visual Expert Source Code Documentation 


.PAE PowerArchiver 20002 Encrypted Archive 

.PAF PARIS Audio Format 

Personal Ancestral File 

.PAG Property Page File 

.PAINT MacPaint Bitmap Graphic [XnView] 

.PAK Compressed Archive File 

Dune 2 Archive [Dragon UnPACKer] 

Final Fantasy 8 [Dragon UnPACKer] 

Half Life Archive [Dragon UnPACKer] 

Hand of Fate Archive [Dragon UnPACKer] 

Heretic 2 Archive [Dragon UnPACKer] 

Hexen 2 Archive [Dragon UnPACKer] 

Lands of Lore Archive [Dragon UnPACKer] 

Quake 2 Archive [Dragon UnPACKer] 

Quake Archive [Dragon UnPACKer] 

Trickstyle Archive [Dragon UnPACKer] 

.PAL Color Palette 

Adobe Pagemaker Library Palette 

Tree Professional Palm Creator File 

Playstation Game (unverified) 

Compressed File 

.PAN Chromeleon Control Panel 

CorelDraw Printer-specific File 

The Panorama Factory Project (versions lower than 2.0, higher use .PFP) 

Infinite Pictures, Inc. iMove Viewer 

SmoothMove Pan Viewer [XnView] 

.PAP Tree Professional Palm Creator Image File 

.PAR Fractint Parameter File 

Parity Volume Sets (.P01,...) (multiple programs - original: Mirror) 

Mirror Archive Restoration File 

SmartPar (takes over after Mirror) 

SolidEdge 3D CAD Model 

Digitalk Parts Application 

Model Parameter File 

Windows 3.x Permanent Output File 

SAP Enterprise Portal Component 

.PART eDonkey 2000 Partial Download 

.PAS Pascal Source Code 

Borland C++ Builder 6 Source 

Borland Delphi Source 

.PAT AutoCAD Hatch Pattern 

Patch File (used to update various programs) 

Corel Vector Pattern [XnView] 

PaintShop Pro Pattern [XnView] 

Advanced Gravis Ultrasound 

Forte Tech. Patch 

DART Pro 98 Pattern 

GIMP Pattern [GIMP] [XnView] 

Arcinfo Coverage File (GIS-related file)

.PAU OzWin CompuServe E-mail/Forum Access Paused Message 

.PAV Panda Antivirus File (unverified) 

.PAV???? Panda Antivirus File (???=numbers; unverified) 

.PAX Project A.R.S.E Brain File 

.PAZ Project A.R.S.E Brain File 

.PB WinFax Pro Phone Book 

PixBase Setup 

FAXability Fax 

.PB1 First Publisher Document 

.PB2 STABCAL (stability calculation for aqueous systems) File 

.PBA Powerbasic Source Code 

.PBD PowerBuilder Dynamic Library 

FaxNOW/Faxit Phone Book 

Faxit Phone Book 

.PBF Turtle Beach Pinnacle Bank File (multilayer sound file) 

Grand Prix Legends BMAP (Bitmap) File 

PBook E-book Format (renamed ZIP file) 

Portable Bitmap Format File 

Paragon Disk Image 

.PBI Profiler Binary Input 

Powerbasic Include File 

.PBK MS Phonebook 

(various small computers use this format for their phonebooks) 

ElectraSoft Fax Phone Book 

.PBL PowerBuilder Library 

Powerbasic Library 

.PBM UNIX Portable Bit Map Graphic [XnView] [IrfanView] 

XLib Planar Bitmap 

.PBN Portable Bridge Notation (stores deals for the card game bridge) 

.PBO Operation Flashpoint Archive [Dragon UnPACKer] 

.PBR PowerBuilder Resource 

BI/Suite Hypercube Presentation 

.PBO Profiler Binary Output 

.PBS PowerArchiver Backup Script 

.PBT Profiler Binary Table 

Micro Dynamics MARS [XnView] 

.PBX MS Outlook Express Message Folder 

.PC PC-specific Text File 

Sierra Print Artist Postcard 

.PC1 Degas & Degas Elite [XnView] 

.PC2 Degas & Degas Elite [XnView] 


.PC3 Harvard Custom Palette (Harvard Graphics taken over by Serif) 

Degas & Degas Elite [XnView] 


.PC5 Rockwell Software Logix 5 File 


.PC8 ASCII Text IBM-8 

.PCA PCAnywhere Registry Backup 

Sonic Foundry Perfect Clarity Audio File 

.PCB Protel Technology Advanced PCB Design 

MS PowerPoint Application Data File [Buy Office XP at Shop.Microsoft] 

Ivex Winboard Design File 

Broderbund Print Shop Business Card 

.PCC PC Paintbrush Image File 

.PCD Kodak Photo-CD Image [XnView] [IrfanView] 

P-Code Compiled Test Scripts 

.PCE Eudora Mailbox Name Map 

Print Shop Envelope 

.PCF Profiler Command File

.PCH Patch File 

MS C PreCompiled Header 

.PCI1 DCX-PCI100 Motion Control Command Language File 

.PCI3 DCX-PCI300 Motion Control Command Language File 

.PCJ IBM Linkaway-Live Multimedia Tool Graphics 

.PCK Turbo Pascal Pick File 

(may be found with many programs that use a pick file) 

ARIA PIPP Spectrum 

.PCL HP Printer Control Language [SwiftView] [XnView] 

.PCM Sound File 

OKI MSM6376 Synth Chip PCM Format 


.PCP Symantec Live Update Pro 

.PCS PICS Animation 


.PCT Bitmap Graphic (Apple PICT Format Usually) 

Macintosh Quickdraw/PICT Drawing [XnView] 

Honeywell GUS Display Builder (factory process overview--an ActiveX container that runs from a viewer) 

NIST IHDR [XnView] 

.PCW PC Write Text File 

.PCX PC Paintbrush Bitmap Graphic [IrfanView] [SwiftView] 

.PD Male MRI [XnView] 

.PDA Bitmap Graphic 

.PDB Palmpilot Database/Document File [XnView] 

Pegasus DataBase 

Tact File 

Adobe PhotoDeluxe Image [XnView] 

MS Visual Dev C++ Debugging Info 

QuickPOS Database File 

Brookhaven Protein Databank File (MIME type chemical/x-pdb) 

MonkeyCard/MonkeyLogo [XnView] 

TealPaint [XnView] 

Powerproject Teamplan (was Power Project) 

.PDC PowerDivX NextGen Media Player Chapter File 

PReS Print Control 

.PDD Adobe PhotoDeluxe Image [XnView] 

.PDF Adobe Acrobat File 

Netware Printer Definition File 

Analyser Protocol Definition File 

Ed-Scan 24-bit Graphic File 

MS Package Definition File (Inventory-related) 

.PDG PrintShop Deluxe File 

.PDI MS Powerpoint File [Buy Office XP at Shop.Microsoft] 

PReS Document Creation Subroutines 

.PDL Borland C++ Project Description Language 

SymbianOS Printer Driver 

.PDM Sybase Power Designer File 

PowerDivX NextGen Media Player 

.PDN Plan de Negocio 

.PDP Broderbund Print Shop Deluxe File 

.PDQ Patton & Patton Flowcharting PDQ Lite File 

.PDR Port Driver (used by many devices) 

SymbianOS Printer Resource File 

.PDS Print Shop Graphic 

Incredimail 

Source Code File 

Telsis HiCall Program File 

Planetary Data System [XnView] 

.PDT ProCite Primary Database 

VersaPro Compiled Block

.PDV Paintbrush Printer Driver 

.PDW Professional Draw Document 

.PDX Paradox Files 

ProCite Database Keys 

Acrobat Catalog Index 

Mayura Draw [XnView] 

.PE PatentEase File 

.PE4 Photo Explorer Thumbnail [XnView] 

.PEB WordPerfect Program Editor Bottom Overflow File 

.PEBPRJ PEBundle File (bundle executable and associated .DLL files) 

.PED WordPerfect Program Editor Delete Save 

.PEM WordPerfect Program Editor Macro 

.PEP TurboProject Project File 

.PEQ WordPerfect Program Editor Print Queue File 

.PER WordPerfect Program Editor Resident Area 

.PES WordPerfect Program Editor Work Space File 


.PET WordPerfect Program Editor Top Overflow File 

Custom CD Menu 

Magic Petz File 

.PF Monitor or Printer Profile File 

Aladdin Systems Private Files Encrypted File 

Quicktime File (unverified) 

Progress Parameter File 

Prefetch (also called Scenario) File (located in %windir%\prefetchfolder) 

(Prefetch files contain info necessary to start applications faster) 

.PF? SmartWare Project Source File (requires login) 

.PFA Outline Font (ASCII) 

.PFB Outline Font (Binary) 

.PFC PF Component 

New Soft Presto! Page Manager File (product often ships with scanners) 

AOL Preferences 

First Choice Text File 

.PFE Programmers File Editor 

.PFF Armored Fist 3 Archive [Dragon UnPACKer] 

Delta Force Archive [Dragon UnPACKer] 

Delta Force 2 Archive [Dragon UnPACKer] 

Delta Force: Land Warrior Archive [Dragon UnPACKer] 

Tachyon Archive [Dragon UnPACKer] 

.PFK XTree Programmable Function Keys 

.PFL SmartStation AppsView File 

.PFM Printer Font Metrics 

.PFP The Panorama Factory Project (versions 2.0 and above, lower use .PAN) 

.PFR PaintShop Pro Frame [XnView] 

WebFont Wizard Portable Font Resource (no longer supported) 

.PFS PFS:File Database / PFS:Write Text 

BIOCCELERATOR Homologous Sequence Names 

.PFT Chiwriter Printer Font 

.PFX Personal Information Exchange File 

.PG IBM LinkWay Cut/Paste File 

Printfox/Pagefox [XnView] 

.PGC Compressed Portfolio Graphic [XnView] 

.PGD Pretty Good Privacy Virtual Disk File 

.PGF Portfolio Graphics [XnView] 

.PGI PGraph Library Printer Device Driver 

.PGL Graphics (Plotter) 

.PGM Portable Graymap Graphic [XnView] [IrfanView] 

Chromeleon Batch Program 

Signature Program 

.PGN Portable Game Notation (Used for chess)

.PGP Program Parameter 

Pretty Good Privacy 

AutoCAD Keyboard Command Shortcuts 

.PGS Man4DOS Manual Page 

.PGX Binary Property Page File 

.PH PERL Header 

Optimized Geoworks .GOH File 

MS Help Compiler Phrase Table 

.PHB NewLeaf PhraseBook 

ClustaW Tree File 

TreeView File (Tree drawing software for Apple Macintosh and Windows) 

PhoneB Phonebook File 

Arcsoft PhotoBase File 

.PHD PC Help Desk File 

.PHL Icon Collection File 

Database Configuration File (GLOBAL.PHL for Postgres or mysql) 

PHP Source File (ASCII text file) 

.PHN UltraFax/QmodemPro Phone List 

.PHO Metz Phone Phone List 

.PHP PHP Script [Also .PHP3 & .PHP4] 

MS Picture It! Publishing Project File 

PhotoParade [XnView] 

.PHP3 PHP Script 

.PHP4 PHP Script 

.PHR NoExcuse Phrase Checker 

LocoScript Phrases 

.PHS PHScript File (document description script) 

.PHT Partial Hypertext File (HTML fragments compiled into a whole) 

.PHTML PHP Script (usually with HTML output) 

.PI Blazing Paddles [XnView] 

.PI1 Degas & Degas Elite [XnView] 






.PIC PC Paint Bitmap Graphic [XnView] 

Advanced Art Studio [XnView] 

Lotus Picture 

Macintosh Quickdraw/PICT Drawing [XnView] 

SDSC Image Tool Pixar Picture 

Bio-Rad Confocal [XnView] 

Pixar Picture [XnView] 

Psion Series 3 Bitmap [XnView] 

Radiance Scene Description Image [XnView] 

Rayshade Graphic [XnView] 

Softimage [XnView] 

Stad File [XnView] 

Delcam Picture File 

.PICIO Pixar Picture [XnView] 

.PICT Macintosh Quickdraw/PICT Drawing [XnView] 

.PICT2 Macintosh Quickdraw/PICT Drawing [XnView] 

.PIF Windows Program Information File 

IBM PIF Drawing 

.PIG Lucas Arts Dark Forces WAD File 

Ricoh IS30 [XnView] 

.PIM PixMaker Project File 

.PIN Pushpin Set 

Compton's 3D World Atlas 

Links Games Player Information File

Epic Pinball Data File 

Graphisoft ArchiCAD 

.PIP MS Office Personalized Menu and Toolbar 

.PIT Macintosh Compressed Archive File 

.PIX PrintMaster Graphic File 

Alias PIX Bitmap [XnView] 

ESM Software Pix [XnView] 

PABX Background [XnView] 

Inset Systems Bitmap 

SDSC Image Tool Alias Image 

Truevision Targa Bitmap [XnView] 

Vort [XnView] 

.PIXAR Pixar Picture [XnView] 

.PJ MKS Source Integrity File 

SuperProject Project File 

Project64 Game Progress File (N64 Emulator) 

.PJL ProCite Term Lists and Journal Title Lists 

.PJT Foxpro Project Memo 

AcuBench Project File 

.PJX Foxpro Project 

.PK CoolEdit96 Graphical Waveform [?] 

TeX DVI Driver Packed Bitmap Font 

.PK3 American McGee Alice Archive [Dragon UnPACKer] 

Return to Castle Wolfenstein File 

Heavy Metal: F.A.K.K.2 Archive [Dragon UnPACKer] 

Quake III Engine PAK File (renamed zip file) [Dragon UnPACKer or any Unzip Program] 

...and other games 

.PKA Compressed Archive File 

.PKB QuickPOS (Point-Of-Sale) Keyboard Layout File 

.PKD Top Secret Crypto File 

.PKF ARTiSAN Real-time Studio (UML CASE Tool) [See .IDF] 

.PKG MS Developer Studio Application Extension 

AppleLink Package Compression Format File 

Newton File/Application (Apple's old PDA) 

Next Installer Script 

.PKO PublicKey Security Object 

.PKR PGP Public Keyring 

Tony Hawk Pro Skater 2 Archive [Dragon UnPACKer] 

.PKT Fidonet Packet 

.PL Harvard Palette (Harvard Graphics taken over by Serif) 

PERL Program File 

Linux Shell Executable Binary 

PROLOG Program File (SWI-Prolog) 

TeX Property List Font Metric 

.PL1 3D Home Architect Room Plan 

.PL3 Harvard Chart Palette (Harvard Graphics taken over by Serif) 

.PLA STABCAL (stability calculation for aqueous systems) File 

.PLB Foxpro Library 

LogoShow Screensaver 


.PLC Lotus Add-in 

.PLD PLD2 Source File (program due out 1Q2001) 

PINO 3 

.PLF InterVideo WinDVD Playlist File 

.PLG REND386/AVRIL File 

.PLI Oracle 7 Data Description 

.PLIST Property List XML File (used in Apple systems) [More Info] 

.PLJ PlayJ Music Format 

.PLK ATI Radeon Video Driver File 

.PLL Clipper Prelinked Library

.PLM DisorderTracker2 Module 

Panasonic SD Voice Editor File 

.PLN WordPerfect Spreadsheet File 

.PLO STABCAL (stability calculation for aqueous systems) File 

.PLR Descent Pilot File 

.PLS DisorderTracker2 Sample 

WinAmp MPEG PlayList File 

Shoutcast File 

MYOB Data File 

MattBatt iAM-player 

.PLT AutoCAD HPGL Vector Graphic Plotter File 

HP Graphics Language (plotter) [SwiftView] 

Gerber Sign-making Software File 

Bentley's CAD MicroStation Driver Configuration for Plotting 

Clipper 5 Pre-linked Transfer File 

X-wing vs. Tie Fighter Pilot File 

Palette 

Lotus Organiser Paper Layout Definition (ver 1,2 maybe others) 

.PLW PicoLog Data File 

.PLX Executable Perl Script 

Neurological Data for Statistical Analysis [File Format & More Info] 

.PLY Autodesk Polygon 

Blaze Media Pro File (multimedia software) 

Harvard Spotlight Presentation Screen 

PopMail Data 

.PM Presentation Manager Graphic [XnView] 

Perl Module 

.PM3 PageMaker 3 Document 




.PMA Windows Performance Monitor File 

.PMC Windows Performance Monitor File/a> 

A4Tech Scanner Graphic 

.PMD Pagemaker File 


.PME Plazmic Media Engine File 

.PMF ArcReader GIS Mapping File 

.PMG Pagemaker Group File (EPS graphic) 

Paint Magic [XnView] 

.PMI Pegasus Mail Message Folder Index File 

.PML NT4 Performance Monitor Log File 

Pegasus Mail Distribution List 

PADGen Program Information 

Windows Performance Monitor File 

.PMM Pegasus Mail Mail Message Folder 

Amaris BTX/2 Program 

.PMO Print Master Gold Text 

.PMP Sony DSC-F1 Cyber-shot [Acdsee] [XnView] 

.PMR Windows Performance Monitor File 

.PMW Windows Performance Monitor File 

.PN3 Harvard Printer Driver (Harvard Graphics taken over by Serif) 

.PND DATAIR Pension System Pending File 

.PNF Precompiled Setup Information (Temporary file seen during installs) 

.PNG Portable (Public) Network Graphic (proposed GIF replacement) [XnView] [IrfanView] 

PaintShop Pro Browser 

Fireworks Image File 

.PNL PEERNET Label Designer File 

.PNM PBM Portable Any Map Graphic [XnView] 

.PNR PEERNET Label Designer File

.PNS PEERNET Label Designer File 

.PNT MacPaint Bitmap Graphic [XnView] 

Paperport Thumbsview 

MarkMail Qwk Reader Pointers 

World Data Bank II Country Data File (derived from CIA data) 

.PNTG MacPaint Bitmap Graphic [XnView] 

.PNU PEERNET Label Designer File 

.PO2 STABCAL (stability calculation for aqueous systems) File 



.POC PocoScript File 

.POD Terminal Velocity Archive [Dragon UnPACKer] 

.POG Descent2 File 

.POH Optimized Geoworks .GOH File 

.POL Music File 

AscToHTM Policy File 

Windows Policy File 

.POLICY Java Policy File 

.POO Poo Patrol Game File (unverified) 

.POP dBase Popup Menu 

PopMail Message Index 

.POS ProCite Output Styles 

QuickPOS IIF File (see IIF above) 

.POT PowerPoint Template [Buy Office XP at Shop.Microsoft] 

.POV Persistence of Vision Ray-tracer 

.POW PowerChords Chord Chart 

.PP Compressed Amiga Archive File 

.PP2 Curious Labs Poser Prop File 

.PP4 Picture Publisher 

.PP5 Picture Publisher 

.PPA PowerPoint Add-in [Buy Office XP at Shop.Microsoft] 

.PPB WordPerfect Print Preview Button Bar 

.PPC Roxio Easy CD Creator File 

.PPD PostScript Printer Description 

.PPF Turtle Beach Pinnacle Program File 

Jasc Paint Shop Pro 7 Preset File 

Micrografx Picture Publisher File (Micrografx now part of Corel) 

PlayStation Patch File 

.PPG MS PowerPoint Ppresentation 

Professor Franklin's Photo Print Gold 

.PPI MS PowerPoint Graphics File [Buy Office XP at Shop.Microsoft] 

.PPJ Adobe Premiere Video Editing File 

.PPK PuTTY Win32 Telnet/SSH Client 

.PPL Harvard Polaroid Palette Plus ColorKey Driver (Harvard Graphics taken over by Serif) 

.PPM PBM Portable Pixelmap Graphic [XnView] [IrfanView] 

.PPMA Portable Bitmap [XnView] 

.PPO Clipper Preprocessor Output 

.PPP Serif PagePlus Publication 

Enfocus Preflight Profile 

Parson Power Publisher 

Punk Productions Picture [XnView] 

.PPR Cognos PowerPlay OLAP Multidimensional Cube 

.PPRINT Pics Print File 

.PPS PowerPoint Slideshow [XnView] [Buy Office XP at Shop.Microsoft] 

.PPT PowerPoint Presentation [XnView] [Buy Office XP at Shop.Microsoft] 

.PPX Serif PagePlus Publication 

Cognos PowerPlay OLAP Reporting 

.PPZ PowerPoint Packaged Presentation [Buy Office XP at Shop.Microsoft] 

.PQ Adobe Pagemaker Default Printer Style 

.PQA Palm Query Application File (database for wireless access)

.PQI Power Quest Drive Imaging Software 

.PQW Corel Presentations 9 Runtime 

.PQX Power Quest DRive Image Index 

.PR EROSION 3D Precipitation Parameters [Format (pdf)] 

Sun Icon/Cursor [XnView] 

.PR1 OzWin CompuServe E-mail/Forum Access Purged Message File 

.PR2 Persuasion Presentation 

dBase IV Printer Driver 

Proteus Session (personal light and sound stimulation system) 

.PR3 dBase IV PostScript Printer Driver 

Aldus Persuasion Presentation 

.PRB xyALGEBRA File 

.PRC Palmpilot Resource File [File Format] 

Picture Gear Pocket [XnView] 

.PRD Printer Driver 

.PRE Freelance Presentation 

MS Programmer's WorkBench Settings 

.PREFS Preferences File (various) 

.PRF Preferences File (various) 

dBase IV Printer Driver 

Monarch Portable Report File (data mining) 

Profiler Output 

PICS Rules File 

Polychrome Recursive Format [XnView] 

Fastgraph Pixel Run Format Grahics 

.PRG Program File (various) 

OzWin CompuServe E-mail/Forum Access Purged Message File 

WAVmaker Program 

Atari Program 


SpecEm Snapshot 

.PRI LocoScript Printer Definitions 

Prisms [XnView] 

.PRJ Project File (various) 

3D Studio File 

HitPlayer Advanced Playlist File 

Monarch File (data mining) 

.PRK Tony Hawk's Pro Skater 2 Saved Park 

CampgroundMaster/ResortMaster Database 

.PRL Process Revolution Object Library File (Diagrams, Process Maps, Flow Charts) 

.PRM Parameter File 

.PRN Printer Text File (various) 

HP Printer Control Language [SwiftView] 

DataCAD Windows Printer File 

XYWrite Printer Driver 

PostScript File 

.PRO Guitar Chord File [On-line Guitar Archive] 

PROLOG Program File 

Creamware Pulsar Audio File 

Sid Meier's SimGolf 

.PRP Palace Prop File 

InstantDB Database File 

.PRS Printer Resource File 

WordPerfect Printer Resource Font File 

dBase Procedure 

Harvard File (Harvard Graphics taken over by Serif) 

.PRT Printer Configuration (various) 

Printer-formatted File 

SCEdit Part File (Roland Sound Canvas sound modules; MIDI-related) 

Unigraphics Part File (CAD modeling data)

CADKEY Part File 

Pro/ENGINEER Model File 

Associated with the W32/Parrot-A worm; particularly if found in the 

Windows directory along with .EXE files of the same root name. 

Process Revolution Template File (Diagrams, Process Maps, Flow Charts) 

.PRV PsiMail Internet Provider Template 

Previous Version (used for files that change) 

.PRX Foxpro Compiler Program 

Process Revolution Diagram File (Diagrams, Process Maps, Flow Charts) 

.PRZ Freelance Graphics 97 File 

.PS PostScript [Ghostscript] [XnView] 

.PSB Pinnacle Sound Bank 

Project Scheduler Configuration File 

.PSD Photoshop Format [XnView] [IrfanView] 

Apple Viewer File 

DESIGN II for Windows General Flowsheet (Refining Process Simulation) 

.PSE IBM Printer Page Segment Bitmap [XnView] 

.PSF Chiwriter PostScript Printer Font 

PhotoStudio Graphic [XnView] 

.PSH Punch Home Design Series CAD Data File 

.PSI PSION A-law Audio 

.PSM Turbo Pascal Symbol Table 

Protracker Studio Module Format 

Epic Games Sound Data 

SolidEdge CAD File 

PrintShop Mail (desktop publishing) 

.PSMDOC PrintShop Mail (desktop publishing) 

.PSMODEL Delcam Powershape (3D CAD) 

.PSN Post-it® Software Notes 

.PSP PaintShop Pro Image [XnView] [IrfanView] 

Project Scheduler Planning File 

Prodea Synergy Procedure 

.PSR Project Scheduler Resource File 

.PSS Sony Playstation Game File 

Axialis Screen Saver Producer File 

.PST MS Outlook Personal Folder File 

Ulead Pattern [XnView] 

.PSW WinXP Backup Password File 

.PSX Dirty Little Helper Chat File 

X-Plorer/X-Ploder, Cheat Machine, etc. Single Game Save 

.PSY PLD2 System File 

Psychedelic Windows Products 

.PT Kodak Precision Transform [Download] 

PassMark PerformanceTest File 

.PT3 Harvard Device Driver (Harvard Graphics taken over by Serif) 

PageMaker Template 

.PT4 PageMaker Template 

.PT5 PageMaker Template 

.PTB Power Tab Guitar Tablature Editor 

PubTach Batch Works Script 

.PTC NRG Symphonie Patch File 

.PTDB Peachtree Accounting Database 

.PTH 4D Database Windows Pathname Document 

.PTI IBM Configurator Configuration 

.PTK Red Alert 2 File 

.PTM PolyTracker Music Module 

MS MapPoint Map 

PubTech BatchWorks Macro 

.PTN PaperPort Thumbnail Images (Hidden file: PPTHUMB.PTN) 

.PTP Act! Modem Sync File

.PTR QMail Qwk Reader Pointer 

.PTS Infinity Engine Game Tileset 

Halflife Map Creation Debug File 

.PTT MS MapPoint Template 

.PTX E-Transcript of Court Proceedings [Viewer] 

.PUB PGP Public Key Ring 

Ventura Publisher 

MS Publisher Document 

The Sims (Maxis) Family Data 

Print Perfect Gold Template 

.PUBHTML MS Publisher HTML Document 

.PUBMHTML MS Publisher Archived HTML Document 

.PUD Warcraft II PUD Map [PUD Browser] [PUD Format] 

.PUF Puffer Encrypted File (File & E-mail Encryption) 

.PUT Instalit Script 

.PUZ Across Lite Crossword Puzzle [FAQ] 

Packed MS Publisher File 

.PVA Hauppauge DVB-Software 

.PVL Instalit Library 

.PVS Scarlett Expert System Compiler Reserved Words File (Scarlett is not presently available) 

.PVT Local Fidonet Pointlist 

.PW Professional Write Text File 

.PWA Password Agent File 

.PWC COSMI Street Maps and Vacation Planner 

.PWD Pocket Word Document 

AutoCAD Password File (ACAD.PWD) 

Password Pro File 

.PWF ProCite Workforms 

.PWI Notes for Windows CE 

.PWK Password Keeper File 

.PWL Password List 

.PWP Photoworks Image File 

Professional WritePlus Document 

Seattle Film Works Multi-image File (Actually MGI PhotoSuite File) [Filmworks Viewer] [XnView] 

.PWT HotDog PageWiz Template 

MS Pocket Word Template File 

Autocad Publish-to-Web Template 

.PWZ PowerPoint Wizard [Buy Office XP at Shop.Microsoft] 

.PX Primary Index 

Paradox Primer Database Index 

.PXA Pixia Color Painter File [Japanese] [XnView] 

Pegs [XnView] 

.PXB Pixibox [XnView] 

.PXD eJay Mixer File 

.PXE Partial XML Envelope 

.PXI Pixie File (scalable vector images viewed with an applet) 

Note: The file $$d2k.pxi is associated with a Trojan 

.PXL Pocket Excel Spreadsheet 

.PXN PictureWorks PhotoEnhancer Graphic Image (Kodak format not now supported) 

.PXR Pixar Picture [XnView] 

.PXS Pegs [XnView] 

.PY PYTHON Script 

Yahoo Saved Messages 

Oracle Batch Procedure 

.PYC Compiler PYTHON Script 

.PZ2 Curious Labs Poser Pose File 

.PZ3 Curious Labs Poser Document 

.PZA MGI PhotoSuite II/III/4 Album File 

.PZC GraphPad Prism Script 

.PZD Pizazz Plus Defaults

.PZF GraphPad Prism Project 

.PZL Puzzle [XnView] 

Lode Runner Game Puzzle 

Jigs@w Puzzle (virtual jigsaw) 

.PZM GraphPad Prism 

.PZO Pizazz Plus Overlay 

.PZP Pizazz Plus Palette 

MGI PhotoSuite II/III/4 Project File [XnView] 

.PZS Pizazz Plus Settings 

MGI PhotoSuite II/III/4 Slide Show File 

.PZT Pizazz Plus Transfer File 

GraphPad Prism Template 

.PZX Pizazz Plus Swap File 

.PZZ Curious Labs Compressed Poser File 

QQQQQQQQQQQQQQQQQQQ http://pulsar.sitemynet.com 

.Q0 Q0 Graphic [XnView] 

.Q00 Quicken 2000 File 


.Q1Q LunarCell Plug-in File 



.Q9Q BladePro Graphic Plugin File 

.QAB QABUTIL File 

SYBYL Binary Field Files 

.QAD PF QuickArt Document 

.QAG Norton Desktop Quick Access Group 

.QAP Omnis Quartz Application File 

.QAX ExpressTracker Data File 

.QB1 Quicken File 

.QBA QuickBooks File 

.QBB QuickBooks for Windows Backup File 

.QBD Keyboard Layout 

.QBE Example Query (Query By Example) 

dBase IV Saved Query 

Quattro Pro Saved Query 

.QBL Business Lawyer Document 

.QBO dBase IV Ordered Query 

.QBS MS Quick Basic Program File 

.QBW QuickBooks for Windows File 

Quicken File 

.QCB MS Combat Flight Simulator Quick Combat Editor File 

.QCD QuarkCopyDesk SE 

Cliq Accessories Phonebook Data [Linux Suite PDF Description] 

.QCF Q-emuLator (a Sinclair QL emulator) 

QuickLogic Constraint File 

.QCH Quicken for DOS ver 2 Data File 

SSI Dark Queen of Krynn File 

.QCI Massively Parallel Quantum Chemistry Program File 

Cliq Accessories Phonebook Index [Linux Suite PDF Description] 

.QCK Quick Charts File 

Quick Foram Count File 

VAX CRYSTALS Chemical Crystallogaphy File 

QuickCard File 

Jigsaw 2 Astrological Tool File

.QCM 3164 Emulator Quick Command File 

QUCM Application File (Link is PDF file) (interface CATERPILLAR CCM devices to POWERLOGIC 

system) 

.QCP Qualcomm PureVoice File 

.QCS CADQC Standard File 

.QCT Memory-Map File (Navigation software for digital maps) 

.QD SHARP MZ-series Emulator File 

.QD? Omnis Quartz Data File Segment (can be 0 to 9) 

.QDAT Quicktime Installer Cache 

.QDF Quicken for Windows Data File 

.QDI Dictionary 

Quicken Data File 

.QDK Quarterdeck QEMM File 

.QDT QuickBooks UK Accountancy Data File 

Quicken Data File 

Question Mark Desigener Test File 

Quark Xpress Dictionary File 

.QDV Steve Blackstock Giffer Graphics File 

Random Dot Software QDV Graphic [XnView] 

.QEF Excel Query [Buy Office XP at Shop.Microsoft] 

.QEL Quicken Electronic Library File 

.QEM Expensable Report 

.QEP IRMA Wordstation for Windows 

.QEX ExpensAble Data File 

.QFI QuickTime Image 

.QFL Family Lawyer Document (Now with Learning Company from Quicken) 

.QFN QuickTime Font File 

.QFX Quick Link Fax 

.QIC Backup Set [Note: People report trouble moving .QIC backup from Win9x to WinXP. 

See the Computer Knowledge QIC page for more info.] 

.QIF Quicken Interchange Format 

QuickTime Image 

.QIX Quicken for DOS ver 2 Data File 

.QLB MS C Quick Library 

.QLC PostScript Help File 

.QLE QOOLE (Quake Object Oriented Level Editor) 

.QLF Family Tree Maker Genealogy File 

.QLP QuickLink Printer Driver 

.QM Quality Motion File 

.QM4 QMail Mail Door Option or Services File 

.QMD Quicken for Windows ver 5,6 Data File 

.QML Quicken for DOS ver 2 Data File 

.QMR OzWin CompuServe E-mail/Forum Access Quickscan History 

.QMT Quicken Memory List 

.QN2 QuickNote File 

.QNA High ASCII Quake Name Maker 

.QNC Cliq Accessories Notepad Customization [Linux Suite PDF Description] 

.QND Cliq Accessories Notepad Data [Linux Suite PDF Description] 

.QNI Cliq Accessories Notepad Index [Linux Suite PDF Description] 

.QNM High ASCII Quake Name Maker 

.QNT Chromeleon Quantification Method 

.QNX Quicken Indexes 

.QPB Quicken Payroll File 

.QPD QP Software Dynamic Plug-in (expected web release 1 Mar 2002) 

.QPR OS/2 Printer Queue Driver 

Foxpro Relational Query 

.QPS QP Software Application File (expected web release 1 Mar 2002) 

.QPW Quattro Pro Project File 

.QPX Foxpro Ordered Query 

.QQT Quick Qard Technology Qardware Definition File

.QR2 Delphi Database Quick Report File 

.QRD BI/Query Query Result (used to be Andyne GQL) 

.QRP Centura Report Builder File 

Liberty for Windows Report File 

Dosh Software File 

.QRS WordPerfect Equation Editor 

.QRT QRT Ray Tracing Graphic [XnView] 

.QRY dBase IV Query 

MS Query 

BI/Query Query 

.QS9 OzWin CompuServe E-mail/Forum Access Scan Result File 

.QSA Encrypted QSA Specifications Database Export File 

.QSC Pxyl Visuals Chart 

.QSD Quicken for Windows Data File 

.QSF Millennium 3 Quick Start File (payroll software) 

.QSL OzWin CompuServe E-mail/Forum Access Forum Quickscan List 

.QSM QuadriSpace Model Format File (2D/3D presentations) 

.QST Quake Spy Tab File 

.QT Quicktime Video 

.QTC Incite Media Assistant File 

.QTF Qtracker Filter (parameters used to filter music or game servers) 

.QTI QuickTime Image [XnView] 

.QTIF QuickTime Image [XnView] 

.QTK Apple Quicktake File (PICT variant created by Quicktake 100/150 camera. Quicktime player needs 

QuickTake driver to show.) 

.QTL Quicktime Movie 

.QTM QuickTime Movie 

.QTMP Qtracker Mapshot Pack (images of game levels) 

.QTP QuickTime Preferences 

Astra Quicktest Report 

.QTPF QuickTime PreFlight Text 

.QTPP Qtracker Program Package (Used to distribute updates) 

.QTS Macintosh PICT Image 

QuickTime Image 

.QTSK Qtracker Skin (PlayerWatch skin file) 

.QTW QText File (mixed English/Hebrew) 

.QTX QuickTime Image 

.QUE Task Scheduler Queue Object 

CuteFTP Queue File 

.QUICKEN Quicken Spreadsheet 

.QVM Quake File (UI.QVM or GAGAME.QVM in VM directory) 

.QW Symantec Q&A Write Program File [Support] 

.QW5 Quicken 5 File 

.QW6 Quicken 6 File 

.QWB MS Money Quotes WriteBack Import File 

.QWK QWK Reader Message File 

.QWP Quiptics Puzzle File 

.QXB Quark Xpress Books File 

.QXD Quark Xpress File 

.QXL Quark Xpress Element Library 

.QXT Quark Xpress Template File 

RRRRRRRRRRRRRRR http://pulsar.sitemynet.com 

.R Pegasus Mail Resource File 

Rebol Script 

Progress Compiled Program File

Ratfor FORTRAN Preprocessor File [FORTRAN] 

.R?? RAR Compressed File (?? can be 00 to 99) 

.R1A Yamaha RM1x Dance-Music Workstation 

.R2A Yamaha RS7000 Music Production Studio Sequencer 

.R2D RISA-2D Simple Analysis & Design 

.R2K Repertoire 2000 Music Database 

.R2P Yamaha RS7000 Music Production Studio Sequencer 

.R33 Train Simulator Game File 

.R3A Yamaha RS7000 Music Production Studio Sequencer 

.R3D RISA-3D 3D Analysis & Design 

.R3P Yamaha RS7000 Music Production Studio Sequencer 

.R64 Top Secret Crypto File 

.R8 RAW Graphic File 

Flight Simulator Texture File 

.R8L LaserJet Landscape Font 

.R8P LaserJet Portrait Font 

.RA RealMedia File [IrfanView] 

.RA6 ReliaSoft ALTA 6 (Accelerated Life Testing Analysis Software) 

.RAD Radiance Scene Description Format [XnView] 

.RAI SPEFO Stellar Spectra Analysis File 

.RAM RealMedia Metafile 

.RAN Dexterpen File (Parametric 2D design and calculation) 

.RAP Rapanalyst File (Rapid Application Predictive Technology Organization Resource) 

Rapidocs Document 

.RAR RAR Compressed Archive 

Java JCA Resource Adapter Module 

.RAS Sun Raster Graphic [XnView] [IrfanView] 

Cals Raster File [SwiftView] 

Max Payne Data File 

Sky Subtracted Data 

.RAST Sun Raster Graphic [XnView] 

.RAT Rating System File 

Rats Data 

Nimbus 7 SAMS Data File (radiance data) 

.RAW RAW RGB 24-bit Graphic [XnView] 

Raw Signed PCM Data 

Sentry 2020 Encryption File 

VitaGraph File (medical testing related) 

Nimbus 7 SAMS Data File (radiance data) 

HSI Raw File [XnView] 

Spectrum Raw Memory Dump 

V41/eV41 Program Files 

.RAX Image File 

.RB RocketEdition File 

Ruby Interpreter Program 

.RB1 R:Base Data File 




.RBB Top Secret Crypto File 

.RBF R:Base Data File 

Oracle Backup File 

MS Rollback File (backup of existing file stored in hidden config.msi directory) 

.RBH RoboHelp Configuration 

.RBM Propellerhead ReBirth Modulation v2.0 

Rail Baron Player Map 

.RBN Richard's Bridge Notation 

Real Sound File 

.RBO Sometimes associated with the Magistr.B Worm [Worm Info] 

.RBPM POrtable Bitmap [XnView]

.RBS Propellerhead Software ReBirth Song 

Rutherford Backscattering Spectroscopy Analysis Package (RUMP) 

MS Rollback Script (see .RBF) 

.RBX XStream Multimedia Simulation Format 

.RBZ Rail Baron Player Saved Game 

.RC Borland C++ Resource Compiler Script File 

Emacs Configuration 

.RC2 ReCycle v.2 Audio Loop 

.RCD PC Anywhere Recorded Session File 

.RCG Netscape Newsgroup File 

.RCH SWAT Reach Output File (river basin scale model) 

.RCI SPEFO Stellar Spectra Analysis File 

.RCM Logos Library System 2.x Verse Map 

.RCP Recomposer's MIDI Sequencer Music File 

.RCS Colin McRae Rally Save Game File (unverified) 

.RCX Lego Mindstorms Robotics Invention System 

.RCY ReCycled Audio Loop 

.RD1 Descent1 Registered Level File 

DATAIR Retirement Document System Data File 

.RD2 DATAIR Retirement Document System Custom Text File 

.RD3 Ray Dream Designer Graphics 

CorelDream 3D 



.RDA Oracle Storage Area File 

.RDB TrueVector Rules Database 

ZoneAlarm Rules Database (IAMDB.RDB file) 

Gear CD Suite File 

Oracle Database Root File 

Wavelet Image Recording (often found with .60D file) 

.RDD ReliaSoft ALTA 6 & Weibull++ 6 (ReliaSoft's Reliability Software) 

.RDF Resource Description Framework File 

Geoworks UI Compiler Source Code 

Chromeleon Report Definition 

Workshare Synergy Collaboration Response File 

Burli Newsroom System File 

Oracle Report Binary Source 

Rate Description File (BLDRATE.EXE output) 

.RDI Device-independent Bitmap 

SPEFO Stellar Spectra Analysis File 

.RDL Descent Registered Level 

RadioDestiny Radio Stream 

Symbian Recogniser Library (allows OS to recognize document formats) 

.RDP Remote Desktop Connection 

.RDS Ray Dream Studio File 

.RDT RDT Tracking File (capture design process and manage the system requirements) 

.RDX Reflex Data File 

.RDZ RemoteDocs File 

Mandrake Linux Install File 

.REC Sprint Record File 

EpiInfo Data 

Windows Recorder Macro 

RapidComm Voice File 

.RED Calrion Modula-2 Path Data 

.REF Cross Reference 

.REG Registration Data (various) 

.REGET ReGet Deluxe Downloader 

.REM Annotation (remark) 

.REP Text Document 

Report File (various)

Blizzard Entertainment Replay File 

Qwk Reader Reply 

.REQ Request 

.RES Resource File (various programs) 

Championship Bass Archive [Dragon UnPACKer] 

Evil Islands Archive [Dragon UnPACKer] 

Half Life Game Map [Maps] [Viewers] 

.RESX MS .NET XML Resource Template 

.REV Geoworks Revision File 

Workshare Synergy File 

WinRAR Recovery Volume File 

.REX REXX Program File 

Oracle Report Definition 

ReCycled Audio Loop Export File 

4D Database Windows Client Local File 

.REZ Resource File 

Aliens and Predator 2 Game File 

Blood 2 Archive [Dragon UnPACKer] 

No One Lives for Ever Archive [Dragon UnPACKer] 

Sanity: Aiken's Artifact Archive [Dragon UnPACKer] 

Shogo Archive [Dragon UnPACKer] 

Resume Divider (split and combine large files) (Link is to Japanese site) 

.RF Sun Raster Graphic 

RealFlash Clip 

.RF? SmartWare Compiled Project File (requires login) 

.RFB RoboForm 

.RFD RecogniFORM Form Definition 

Emperor: Battle for Dune Archive [Dragon UnPACKer] 

.RFF Maggi Graphic File 

.RFG RFG Integrator System Database 

.RFH RFG Integrator Householding Database 

Maxagrid CTM Refresh File (text format) 

.RFI SPEFO Stellar Spectra Analysis File 

.RFL RISAFloor Analysis & Design 

Reason Sound File 

Guardian Database Roll-forward File 

.RFP AI RoboForm Passcard Database 

.RFT IBM DisplayWrite Revisable Format Text 

AI RoboForm Form Database 

.RGB Q0 Graphic [XnView] 

Silicon Graphics RGB [XnView] 

.RGBA Silicon Graphics RGB [XnView] 

.RGI RealArcade Game Installer (not secured) 

.RGL Scarlett Expert System Compiler Rules File (Scarlett is not presently available) 

.RGN Championship Manager Game File 

.RGP RealArcade Game Package 

.RGS RealArcade Game Installer (secured) 

.RGX ReaGeniX Code Generator Symbol Table 

.RH Borland C++ Resource Header File 

.RI Lotus File 

.RIA Alpharel Group IV Raster Graphics File 

.RIB 3D Reality Renderman Format Graphics 

.RIC Ricoh FAX Graphic File 

.RIF Fractal Painter Bitmap 

.RIN RappInfo PostScript Converter Configuration File 

.RIP Remote Imaging Protocol 

.RIX ColorRIX VGA Paint File [XnView] 

RIX Virtual Screen 

.RKV RKIVE Compressed Archive 

.RL The 7th Guest Archive [Dragon UnPACKer]

.RL1 Descent1 Registered Level File 

.RL2 Descent2 Registered Level 

.RL4 Bitmap Graphics 

.RL8 Bitmap Graphics 

.RLA Advanced Visualizer File 

Wavefront Raster Image 

.RLB Harvard Graphic File (Harvard Graphics taken over by Serif) 

.RLC Image Systems CAD Overlay (RLC2 Graphic) [XnView] 

Scanner One-bit/pixel Grahpic Output 

.RLE Graphic (Run Length Encoded) [XnView] [IrfanView] 

Utah Raster Image [XnView] 

.RLG ReliaSoft ALTA 6 & Weibull++ 6 (ReliaSoft's Reliability Software) 

.RLT ReliaSoft BlockSim & Weibull++ 6 (ReliaSoft's Reliability Software) 

.RLW ReliaSoft ALTA 6 & BlockSim & Weibull++ 6 (ReliaSoft's Reliability Software) 

.RLZ Realizer Source Code 

.RM RealMedia File 

.RMD RegMaid Document 

.RMF Rich Map Format (3D Games) 

Acrobat File 

.RMI MIDI File [IrfanView] 

.RMJ Real Jukebox File 

.RMK Clipper RMake Make File 

.RML Redline Markup Language File (XML-based exchange of design markup and redline information) 

.RMM RealPlayer File 

.RMR Resume Maker File 

.RMS AutoCAD Data File for Boss RMS (River Modelling System) 

Secure RealMedia File 

.RMX RealJukeBox MP3 File 

.RN Nota Bene XPL Program 

.RND AutoCAD Rendering Slide 

AutoShade Format 

.RNG Nokia Ringtone File 


.RNL GTX Runlength Raster Graphics 

.RNO VAX Runoff File 

.RNX RealPlayer File 

.ROF ReliaSoft RG (Reliability Growth Analysis Software) 

.ROI Actuate ReportBlast File 

.ROL Adlib Music File 

.ROM Nintento 64® Emulation ROM Image 

(actually most any emulator or BIOS flasher) 

MZ700 Emulator (MZ700.ROM) 

.ROQ Medal of Honor - Allied Assualt 

.ROV Rescue Rover Data 

.ROX Actuate ReportBlast File 

.RP RealPix Clip 

Rainbow Painter [XnView] 

.RP? RescuePro Physician Invoice File (? can be 0-9) 

.RPB Automotive Diagnostic File 

.RPBM Portable Image [XnView] 

.RPC Rich Photorealistic Content (ArchVision, Inc.) [Info] 

.RPD Rapidfile Database 

RPV Printing System File 

RosaPro File (Timetable schedules) 

.RPGM Portable Greyscale [XnView] 

.RPIN Adobe InDesign Import/Export Filter 

.RPJ Relex (Reliability Analysis Software) 

.RPK Rippack File 

RadLight Skin 

.RPL Replica Text File

.RPM RedHat Package Manager (Linux Library) 

RealMedia Player File 

RunPaint Multicolor Graphic [XnView] 

.RPNM Portable Image [XnView] 

.RPPM Portable Image [XnView] 

.RPS Propellerhead Software Reason Song 

.RPT Report (various) 

.RPV Real Player Visualization File (animated effects to beat of music) 

RPV Printing System File 

Rebel Poker Player File (Note: Strip poker with nude graphics) 

.RPW RPWiz Project (slide show development) 

.RPY Star Wars - Tie Fighter Media 

Grand Prix Legends Racing Simulation Game File 

.RQY MS Excel OLE DB Query File [Buy Office XP at Shop.Microsoft] 

.RR Railroad Tycoon 

.RRD ERDAS Imagine File (remote sensing) 

.RRI SPEFO Stellar Spectra Analysis File 

.RRS Road Rash Save File 

.RS Amiga Reassembler Resource Data File 

EROSION 3D Event File [Format (pdf)] 

Sun Raster Graphic [XnView] 

.RS_ Macintosh File Resource Fork 

.RSB Rogue Spear Bitmap 

Red Storm Image Format [XnView] 

ReliaSoft BlockSim (System Reliability Software) 

.RSC Resource File 

SymbianOS Application Resource File (application resources) 

.RSF Mediafour MacDrive Macintosh Resource Fork 


.RSL PC Tools Resources Library 

Borland's Paradox 7 Report 


ReliaSoft ALTA 6 (Accelerated Life Testing Analysis Software) 

.RSM RuneSword II Game 

Resume (often an MS Word file) 

WinWay Deluxe Resume File 

ReliaSoft MPC 3 (MSG-3 Aircraft Maintenance Program Software) 

.RSML Real Player File 

.RSN Propellerhead Reason Audio File 

.RSP Responce Text File 

MS ODBC Driver Configuration File (Installation direcives used setting up MS Universal Data Access 

services) 

Rockwell Software Logix 5 File 

Workshare Synergy Response File 

MDaemon File 


.RSR 4D Database Resource Fork File (.4D? for data fork) 

.RSS Rockwell Logix 500 SLC-5 Software 


.RST ANSYS Results 


.RSW ReliaSoft BlockSim (System Reliability Software) 

.RT Real Media File 

.RTA RoboHelp Configuration 

.RTF Rich Text Format File (also used as Windows Help file script) 

.RTH ANSYS Results 

.RTK RoboHelp Configuration 

.RTL Text File 

NU 7.0 Runtime Library 

.RTM Real Tracker Music Module

ReliaSoft RG (Reliability Growth Analysis Software) 

.RTP TurboTax Update File 

RTPatch Update Package 

Gerber Sign-making Software File 

.RTS RoboHelp Configuration 

RealAudio RTSL Document 

Realizer Runtime Library 

.RTX Reliacast Audience Manager Turnstile 

Mobile Phone Ringtone (extended ringtone format) 

.RUI SPEFO Stellar Spectra Analysis File 

.RUJ Oracle Recovery-Unit Journal 

.RUL InstallShield 

.RUN PC Tools Script Tools Program 

.RV RealVideo Clip 


.RVG Revit External Group File 

.RVI Revenant Archive [Dragon UnPACKer] 

.RVM Revenant Archive [Dragon UnPACKer] 

.RVN Riven Saved Game 

.RVP Microsoft Scan Configuration File 

C|Net CatchUp File Mime Type: application/x-mss-scancfg 

.RVR SPEFO Stellar Spectra Analysis File 

.RVS Revenant Archive [Dragon UnPACKer] 

.RVT Apache Rivet Tcl File 

IEX Workforce Management Report (text file) 

Incite Media Assistant File 

Revit Design Setup File 

VersaPro Reference View Table 

.RVW Review (may just be text file) 

.RW6 ReliaSoft Weibull++ 6 (Life Data Analysis Software) 

.RWA ReliaSoft Weibull++ 6 (Life Data Analysis Software) 

.RWD Symphonie Raw Wind Data 

.RWG Random Word Generator 

.RWMT ReliaSoft Weibull++ 6 MT (Machine Tool Industry Life Data Analysis Software) 

.RWP IBM Configurator Report (if you don't have the program ask the sender to export to .RTF for you) 

.RWS Borland C++ Resource Workshop Data File 

.RWX RenderWare Script 

.RWZ MS Outlook Rules Wizard File 

.RX Reflex Database Driver 


with E] 

.RXC WRQ Reflection X Connection 

.RXD Reflex Database 

.RXF Recipe Exchange Format (Resort Software format for chef/food & beverage manager data exchange) 

.RXH Reflex Database Help File 

.RXN MDL RxnFile (MIME type chemical/x-mdl-rxnfile) 

.RXR Reflex Database Report 

.RXS Reflex Database Screen Driver 

.RZR in-sync Speed Razor Project File 

.RZX in-sync Speed Razor Project File 

.S Assemb ler Source Code 

Scheme Source Code 

.S$$ Temporary Sort File 

SSSSSSSSSSSSSSSSSSSS http://pulsar.sitemynet.com

.S$N Mindstore Digital Wallet File (M$A$W$.S$N) 

.S?? RAR Compressed File (?? can be 01 to 99 after .R99) 

.S01 WordPerfect Distribution File 



.S16 Sigames File 

.S19 Motorola Assembly-Language Program ASCII-HEX Data File 

.S28 Genesis or Sega32X Rom Image 

.S2P Sonnet File 

.S3D EverQuest File 

Strata 3D (3D modeling/animation) 

.S3I ScreamTracker v3 Instrument 

.S3M ScreamTracker v3 Sound File 

.S4T Patent Application Specification Authoring Tool (PASAT) File 

.S4W Patent Application Specification Authoring Tool (PASAT) File 

.S8 Simul8 Simulation 

.SA1 Panasonic e-wear MP3 Player File 

.SA4 STABCAL (stability calculation for aqueous systems) File 

.SA8 Street Atlas File 

.SAB ModelMaker File (3D scanner) 

.SAC Adobe Shared Asset Catalog 

.SAD Serveron Analyzer Data File 

Electronic Arts Black & White Game Sound File [Dragon UnPACKer] 

.SAF MusicMatch Jukebox Secure Audio File 

.SAH SETI@Home Data File 

.SAK Software Administration Kit (Customer Tracking for Shareware Authors) 

.SAL Soritec Data 

.SAM Ami Pro Text File 

Map File (HOSTS.SAM - Maps IP addresses to machine names) 

Signed 8-bit Sample Data 

CalTech PaleoMag Data File 

.SAN The Curse of Monkey Island Movie File 

Legacy of Kain Series Game File 

.SAR Phoenix Server Applications Standard Distribution Format (.JAR file in special directory) 

Sons Of The American Revolution Family Tree Creator Data 

Saracen Paint [XnView] 

.SAS SAS System File (statistical anaysis) 

.SAT ACIS Solid Model (any ACIS-based CAD program) 

.SAV Backup 

Saved File (various) 

Saved Configuration Info (various) 

.SB Audio File 

Raw Signed Byte (8-bit) Data 

.SBD Storyboard Editor Storyboard 

.SBF Superbase 95 File 

.SBI Sound Blaster Instrument File 

.SBK Emu SoundFont v1.x Bank Files 

Superbase 95 File 

Creative Labs SB AWE 32 

Statfoot32 Soccer League Tracking File 

SWiSH Backup File (Flash animation) 

.SBL Shockwave Flash Object 

Softbridge Basic Language 

.SBM Hello Network HelloCombined Media Player (MultiPlatform Streaming Media Player) 

.SBN ArcView Optional Shape File (GIS-related) 

.SBP Superbase DML Program 

Scratchboard 

SetupBuilder Professional Projects File 

.SBR Source Browser Support File 

.SBS SWAT HRU Output File (river basin scale model)

.SBT Superbase Record Notes 

.SBW Savings Bonds Wizard (U.S. Treasury program) 

.SBX ArcView Optional Shape File (GIS-related) 

.SC Framework Screen Driver 

Paradox Source Code 

Ingres Embedded SQL/C Source File 

.SC? ColoRIX Image (? can vary) [XnView] 

.SC2 Sample Cell 

SimCity 2000 City 

II PC Instrument 

Schedule+ File 

SAS Catalog 

MSX 2 Screen [XnView] 

.SC3 Harvard Screen Driver (Harvard Graphics taken over by Serif) 

SimCity 3000 File 

dBase Screen Mask File 

.SC4 RollerCoaster Tycoon Scenario 

Creative NOMAD MP3 Manager 

.SCA SCA Datafile 

Scala InfoChannel Script 

.SCANNER Scanner Output File (usually a bitmap image) - Note: I've had reports of this but cannot confirm 

.SCB Scala InfoChannel Published Script 

System Cleaner 

.SCC Text File 

Stamp Collector's Girl Friday Catalog File 

Source Safe File 

.SCD Graphic (SCODL Scan Conversion Object Description Language) 

Schedule+ File 

TurboTax Schedule File 

.SCE SoftCuisine Data Exchange File 

.SCF Windows Explorer Command 

Symphony Spell Checker Configuration 

Photo Soap2 File 

ScoreMaker Multimedia Show 

.SCG Septerra Core Saved Ga me 

.SCH Schedule+ File 

EAGLE Schematic File 

OrCad Schematics File 

P-CAD Schematic File 

Xlinix Foundation Schematic 

XML Schema 

.SCI ScanVec Inspire File 

ColoRIX Image [XnView] 

SciFax FAX [XnView] 

System Configuration Data 

.SCL SCALA Scale 

.SCM SchematicMaker (Topanga Software) File 

ICQ Sound Compressed Sound Scheme 

Scheme Program 

ScreenCam Movie 

Starcraft Map File 

.SCN Compressed Screen format 

TrueSpace2 Scene 

Pinnacle Studio Scene File (Info about scenes found in same-named .AVI) 

Scenario File For Many Games Including: Age of Empires, Age of Empires: Rise of Rome, 

Seven Kingdoms, SimCity Classic, SimCity 2000, SimCity 3000, SimCity 3000 Unlimited 

.SCO High Score (various) 

ObjectJ AuthorJ Saved Lesson 

.SCP Script (various) 

.SCR Faxview Fax

Screen Saver 

Procomm Plus Screen Snapshot File 

Script (various) 

DOS DEBUG Input File (can be any extension but often .SCR) 

LocoScript Screen Font File 

Statistica Scrollsheet 

Movie Master Screenplay (DOS software replaced by Hollywood Screenplay) 

Sun Raster Graphic [XnView] 

.SCS StuffIt Saved Criteria 

OzWin CompuServe E-mail/Forum Access SYSOP File 

Samsung Q105 Phone Screen Saver 

Omron CX-Supervisor (Factory Automation) 

.SCT Foxpro Screen 

PC Tools Script Tools 

Scitex Continuous Tone Bitmap [XnView] 

SAS Catalog 

OzWin CompuServe E-mail/Forum Access Forum Section Names 

Windows Script Component 

Lotus Screen Capture Text 

.SCV ScanVec CASmate File 

.SCW Score Writer Document (music score) 

.SCX MS FoxPro Screen File 

ColorIRX Image File [XnView] 

Stanford Chart 

Starcraft Map File 

.SCY ReaGeniX Security File 

.SD Sound Designer I Audio 

.SD0 Dali Raw File [XnView] 

.SD1 Dali Raw File [XnView] 

.SD2 Sound Designer II Flattened File 

Sound Designer II Data Fork 

SAS Database 

Dali Raw File [XnView] 

.SD7 Daktronics Venus 7000 Electronic Sign Schedule 

.SD! OzWin CompuServe E-mail/Forum Access Custom Messsage Search Online 

.SDA StarOffice Drawing 

Fidonet Software Distribution Network Archive Description 

SoftCuisine Data Archive 

PGP Encrypted Executable 

.SDB Simply Accounting File 

Group Mail Subscriber Plug-in File 

MS Win2000 Security Configuration and Analysis Database 

.SDC StarOffice Spreadsheet 

.SDD StarOffice Presentation 

.SDF Standard Data Format 

Standart-Delay-Format (Chip design gatelevel-delay data exchange... 

e.g., Synopys to Modelsim) 

Schedule Data File 

System File Format 

Autodesk MapGuide Spatial Data Files 

.SDG Star Office Gallery [XnView] 

.SDI Fidonet Software Distribution Network Info 

.SDK Roland S-series Floppy Disk Image 

Autosketch Drawing 

.SDL SmartDraw Library 

OzWin CompuServe E-mail/Forum Access Custom Messsage Search 

.SDN Shell Archive 

Fidonet Software Distribution Network Compressed Archive 

.SDOC Sealed Word File [Unsealer]

.SDP QuickTime Session Description Protocol File (resides on server; contains info about format, timing, & 

authorship of streamed media) 

Real Player File 

StarOffice Picture File 

.SDR SmartDraw Drawing 

.SDS StarOffice Chart 

Raw Midi Sample Dump Standard File 

.SDT SmartDraw Template 

Dungeon Keeper 2 Archive [Dragon UnPACKer] 

Theme Park World Archive [Dragon UnPACKer] 

.SDV Semicolon Divided Values File 

.SDW StarOffice Text 

Raw Signed DWord (32-bit) Data 

Lotus WordPro Graphic 

.SDX Midi Sample Dump Standard Files Compacted by SDX 

.SDV Pinnacle Studio DV Video Editing Project 

.SE ScopeEdit Project File 

.SEA Macintosh Compressed Archive File [StuffIt] 

.SEB Franklin eBookMan Format 

.SEC Compressed Archive File 

Disney Animation Studio Secured Animation File 

PGP Secret Key Ring 

MP3 Music File (unverified) 

.SEE LISCAD Plus File 

.SEF Steganos Encrypted File 

.SEG Compressed File Segment 

.SEL PaintShop Pro Selection File 

.SEM ZX Spectrum-Emulator Snapshot 

.SEO ScopeEdit Object File 

.SEP TIFF Bitmap Separation 

.SEQ Atari Animation File 

TestStand Sequence File 

Bubble Chamber Sequential Instruction File 

Chromeleon Sequence List 

LifeForm File 

Stad File [XnView] 

Power Tracks Pro Music Sequencer File 

.SEQU Acrobat Sequence File 

.SES Digital Audio Editor File 

Clarion Modula-2 Session Data 

Hummingbird Exceed X-Session 

Shadow Security Scanner Session 

.SET Driver Set 

Image Settings 

Backup File Set 

Configuration (various) 

.SEU Serials 2000 Encrypted S2K Update 

.SEW Janome (New Home) Sewing Machine File 


.SEX Urban Chaos Game File 

.SF Sound File [Linux Player] 

OS/2 WPS Attribute Storage 

IRCAM SoundFile 

Powerhouse Subfile Data File (contents defined by .SFD dictionary) 

.SF2 Emu SoundFont v2.0 File 

Creative Labs Soundfont 2.0 Bank File 

.SFA Sonic Foundry Video Editor Audio File 

.SFC Snes9x (freeware Super Nintendo Entertainment System (SNES) emulator) 

.SFD SoundStage Sound File Data 

Powerhouse Subfile Dictionary (describes .SF file contents)

.SFE Split Files Shell Extension 

.SFF Fritz Fax-Print File 

Stage Scene File 

Structured Fax Format [XnView] 

.SFI Ventura Printer Font 

SoundStage Sound File Info 

SIS Framegrabber Graphics 

.SFK Sound Forge Peak Data File 

.SFL Ventura Printer Font 

LaserJet Landscape Font 

.SFM DART Pro 98 Soundtree Structure 

.SFN SPX Font 

.SFP Ventura Printer Font 

LaserJet Portrait Font 

.SFR Sonic Foundry Sample Resource 

.SFS StarOffice Frame 

PCL 5 Scalable Font 

.SFT Chiwriter Screen Font 

.SFV QuickSFV/WinSFV Checksum File 

Easy SFV Creator 

fsum (free command line checksum file creator/verifier) 

.SFW Seattle Film Works File (Actually MGI PhotoSuite File) [Filmworks Viewer] [XnView] [IrfanView] 

.SFX Self-extracting Archive 

.SG ABC Snap Graphics User File 

.SG1 Stanford Graphics 

.SGA SEG-A Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] 

.SGB SEG-B Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] 

.SGC SEG-C Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] 

.SGD SameGame Data File 

SEG-D Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] 

.SGF Smart Game Format 

StarWriter Document 

Sonique Document with Graphics 

.SGI Silicon Graphics IRIS Graphic File [XnView] [IrfanView] 

.SGIF Sealed GIF File [Unsealer] 

.SGL StarOffice Master Document 

.SGM SoftQuad XMetaL File 

.SGN Sierra Print Artist Sign 

.SGO SansGUI Object Library File (compiled class definitions and objects for building models) 

.SGP Statgraphics Plus Statistics 

SansGUI Project Model File (model configurations and input parameters defined by simulation users for 

simulation runs) 

.SGS SansGUI Schema Definition File (class schemas defined for a simulator) 

.SGT Hitman Game Sound File 

DirectMusic Producer 

Signature Keyboard Macro 

.SGU GJDV Word Processor Keyboard Definition File 

Band-in-a-Box File 

.SGW Settler GOLD for Windows Data File 

.SGY SEG-Y Seismic Data Format (SEG=Society of Exploration Geophysicists) [data processing: Lacey] 

.SH UNIX shar Archive File 

UNIX/LINUX Shell Script 

.SH3 Harvard Presentation (Harvard Graphics taken over by Serif) 

.SHADER Script File for Game Textures (ASCII file--but, it's easier if you use Photoshop) 

.SHB Corel Background File 

Document Shortcut File 

.SHD Print Spooler Shadow File 

.SHE Medusa CAD File [Outdated. Medusa CAD sold by PTC to CAD Schroer.] 

.SHG Hotspot Editor Hypergraphic 

.SHIFTS ARIA PIPP Chemical Shifts File

.SHK Apple II Compressed Archive File 

.SHM WordPerfect Shell Macro 

.SHN Shorten Audio Compression File [Additional] 

.SHP 3D Studio Shapes File 

GIS Software Geographic Shape File [GIS info] 


3D Modeling File (various) 

.SHR UNIX shar Archive File 

.SHS Shell Scrap Object File 

.SHTM HTML File Containing Server Side Directives 

.SHTML HTML File Containing Server Side Directives 

.SHW Corel Presentation 

WordPerfect Slide Show 

Show File 

.SHX AutoCAD Shape Entities 

GIS Software Geographic Shape Index File [GIS info] 


.SI SoftImage Image File [XnView] 

.SIB Sibelius Music File 

.SID Commodore64 Music File [Player] MIME type: audio/prs.sid 

LizardTech MrSID Photo [Free plug-in viewer] 

.SIF Windows NT Setup File 

Autodesk Spatial Index File 

.SIG Signature File 

Print Shop Sign File 

.SIK Backup File 

.SIM Simulation (various) (e.g. Setup for Nascar4) 

Aurora [XnView] 

PowerDVD File (powerdvd.sim) 

PC Finder 2002C (Trace stolen computers) 

.SIR SIR (Scientific Information Retrieval) Database (ver 1-3) 

BYU SIR [XnView] 

Solitaire Image Recorder [XnView] 

.SIS SymbianOS Installer File (application installation archive) 

.SIT StuffIt Compressed Archive File (Multiple platforms ) 

Sinclair Snapshot 

.SITHQX StuffIt Compressed Archive File (Multiple platforms ) 

.SIZ Oracle 7 Configuration 

.SJ1 Sega SJ-1 DIGIO [XnView] 

.SJF Split Files Shell Extension 

.SJPG Sealed JPEG File [Unsealer] 

.SJX Seljax Estimating and 3D Design 

.SKA PGP Secret Keyring 

.SKB QuickPOS (Point-Of-Sale) Standard Keyboard Layout File 

.SKCARD Sidekick File (now a discoutinued product of Starfish which maintains a FAQ) 

.SKD WinOrbit File 

AutoSketch File 

VEX Format File 

Max Payne Model File 

.SKF Autosketch 

.SKL Authorware Resource 

.SKN FileWrangler/SecurDesk!/ImageForge Graphic Skin 

eRocket eBook Skin 

The Sims (Maxis) 3D Body Mesh Skin Data 

Skantek [XnView] 

.SKR Microsoft ScriptIt 

.SKY ActiveSky Movie Clips for Palm OS 

.SKZ coverXP Skin File 

.SL S-Lang Program File 

PACT's Save Layout

EROSION 3D Soil Parameters [Format (pdf)] 

.SLB AutoCAD Slide Library 

.SLC Telix Compiler SALT Script 

.SLD AutoCAD Slide 


.SLDASM Solidworks Assembly File 

.SLDDRW Solidworks File 

.SLDLFP Solidworks File 

.SLDPRT Solidworks File 

.SLF Shopcalc List File (Cabinet Door & Drawer Cutting List Calculator) 

Suppose Stand List File 

SLIDE: Scene Language for Interactive Dynamic Environments File 

SuperLink Folder Manager for Readers 

Mail Warden 

Segment Layout File (IMS Database related) 

SortWizard Export Format 

.SLG Chromeleon Audit Trail 

.SLI MagiCorp Side Service Slide 

.SLK Data Exchange File (Symbolic Link - Often used by Excel) 

Timeslips Lock File 

.SLL Sound File 

.SLM Microsoft Visual FoxPro 

.SLN MS Visual Studio Solution 

.SLP Timeslips Data File 

.SLT Telix SALT Script Application 

Super Level Loader Snapshot [Format] 

.SLW Settler LITE for Windows Data File 

.SLY Parts of a Lilypond Guitar File (ASCII text) 

.SM Smalltalk Program File 

SoftSpoken Mailer Mailing List 

ScriptMaker Script 

Simentor Data File 

Samna Word Text File 

.SM3 DataCAD Symbol File 

.SMC Super Nintendo Game-console ROM Image [See ZNES or SNES9x] 

.SMCL Stata Saved Formatted Logs 

.SMD StarOffice Mail 

Sega Genesis/Mega Drive Emulator 


.SMF StarOffice Formula 

Smartfax Fax 

.SMHT Sealed MHT Archive [Unsealer] 

.SMI RealPlay SMIL File 

Self Mounting Image File (Apple Macintosh) 

.SMIL Synchronized Multimedia Integration Language [RealPlay] 

.SMK Smacker Compressed File 

.SML Simple Markup Language 

.SMM Ami Pro Macro 

.SMOV Sealed QuickTime Movie File [Unsealer] 

.SMP Sample or Samplevision Format 


Ad Lib Gold Sample 

PhotoImpact Gallery File 

.SMP3 Sealed MP3 File [Unsealer] 

.SMPEG Sealed MPEG Movie [Unsealer] 

.SMPG Sealed MPG Movie [Unsealer] 

.SMRD Adobe InDesign Import/Export Filter 

.SMS MS Package Definition File (used now in place of .PDF) 

Sega Master System Emulator 

.SMT HiPer-Six Memo File

SmartWare II Text File 

.SMWT Adobe InDesign Import/Export Filter 

.SMX Statistica Matrix Spreadsheet 

.SNA Mirage Microdrive Snapshot [Format] 

.SNAP Mirage Microdrive Snapshot [Format] 

.SNAPSHOT Mirage Microdrive Snapshot [Format] 

.SNB SigmaStat File 

.SNC Act! Modem Sync File 

.SND Sound Clip [IrfanView] 

Raw Unsigned PCM Data 

AKAI MPC-series Sample 

NeXT Sound 

Macintosh Sound Resource 

Heroes of Might & Magic 3 Archive [Dragon UnPACKer] 

.SNES Super Nintendo Game File (unverified) 

.SNG Midisoft Studio MIDI Song 

.SNI MDK Archive [Dragon UnPACKer] 

.SNK Strong Name Key File (part of the .NET architecture) 

.SNM Netscape Mail 

.SNO SNOBOL Program File 

Siege Editor Node 

.SNP Snapview Shapshot 

MS Access Snapshop [Viewer] (page of Access report preserves layout, etc.) 

CoffeeCup HTML Editor Snippet 

Computer Eyes Video Output 

.SNT MS Sticky Notes (accessory for Windows XP tablet PC edition - due end 2002) 

.SNX Second Nature Software Graphic 

Mirage Microdrive Snapshot Extended Version 

StarCraft Saved File 

.SO Oberlin DRAGN Graph Algorithm 

UNIX Shared Library Function (similar to .DLL file) 

.SOA Sage MAS 90 Accounting Software File 

.SOC SociometryPlus Sociometric Group 

.SOE Shadows of the Empire 

.SOL Game Solution (various games) 

.SOM Paradox Sort Info 

Quattro Pro Network Serial Numbers 

.SOU SB Studio II Sound 

.SP Splint Compressed Archive File (UNIX) 

VgaSpec/Spectrum Snapshot [Format] 

.SPA SmartPA Saved Capture File 

Thermo Nicolet OMNIC File 

Smart Protocol Analyzer Real Time Communication Data 

.SPC Multiplan Program 

WordPerfect Temp File 

Interact Shark Port Code Save (SharkPort=code/game save xfer kit for PlayStation 2) 

SNES Audio file 

PKCS #7 Certificate 

Spectrum 512 Compressed File [XnView] 

.SPD Harvard Bitstream Typefaces (Harvard Graphics taken over by Serif) 

PostScript Printer 

Mini-driver 

Speech Data File 

Speedo Scalable Font 

.SPDF Sealed PDF File [Unsealer] 

.SPF Site Publisher Profile 

EnerGraphics Slide Presentation 

.SPG Sprint Glossary 

.SPH SDR99 Speech Recognition Task SPHERE Waveform 

.SPI Scanner Graphics

.SPJ Site Publisher Project File 

.SPL Compressed Archive File 

Printer Spool File [MS Knowledgebase Article] 

Sprint Printer Driver 

Sample File 

Spell Checker 

Digitrakker Sample (by n-FaCToR) 

Shockwave Flash Object 

Split Files Shell Extension 

Infinity Engine Game Spell 

.SPM WordPerfect File 

.SPN WordPerfect Distribution File 

.SPNG Sealed PNG Graphic [Unsealer] 

.SPO SPSS Statistical Program 

.SPP Sprint Printer File 

Serif PhotoPlus Native Format File 

.SPPT Sealed PowerPoint File [Unsealer] 

.SPR Sprint Document Letter 

Foxpro Generated Screen Program 

Sprite 

.SPS Sprint Screen Driver 

SharkPort File (transfers game saves from computer to PlayStation2) 

VAX/VMS Source Code 

Spectrum 512 Smooshed File [XnView] 

.SPT SPITBOL Program File 

Liquid Audio Player Secure Portable Track File 

MITAC Disk/System Management Utility Pack Support File 

.SPU Spectrum 512 [XnView] 

.SPW SigmaPlot Worksheet 

.SPX Foxpro Compiler Screen Program 

Screen Peace Extension 

.SPZ Spazz3d VRML File 

.SQ7 Daktronics Venus 7000 Electronic Sign Sequence 

.SQB SyQuest Backup 

.SQC Structured Query Language Common Code File [SQL] 

.SQL Structured Query Language Data [SQL] 

.SQM Operation Flashpoint Mission 

.SQR Structured Query Language Program File [SQL] 

.SQS Operation Flashpoint Script 

.SQZ Compressed Archive File 

.SR Sun Raster Graphic [XnView] 

.SR1 SIR (Scientific Information Retrieval) Database 





.SRB Corel ClipArt ScrapBook 

.SRC Sourcecode (various) 

.SRF Sun Raster Graphic File 

Siebel Repository File (compiled objects) 

.SRI Voice It Link Compressed Voice File [Free player] 

.SRM Super Nintendo ROM Saved File (saved game) 

.SRP QuickLink Script 

.SRPM Redhat Linux RPM Source File 

.SRT BSplayer Subtitle File 

SDR99 Speech Recognition Task Speech Recogniser Transcript 


.SS Splash Bitmap Graphic 

DrScheme Programming Environment File 

XShipWars Sound Scheme File

Ribbons File (protein analysis) 

Oberlin DRAGN Graph Algorithm 

.SSA Subtitles 

.SSC HP Library and Tape Tools Script 

SwordSearcher File 

Scrippy File (E-mail stationary) 

.SSD SAS Database 

Snagit Studio Design File 

.SSF Enable Spreadsheet File 

.SSH2 SSH Secure Shell Client 

.SSI Installer/GD Software Setup Information 

SriSun [XnView] 

.SSK SwordSearcher File 

SmartSketch File (Use Hijaak to convert - SmartSketch became FutureSplash which became Macromedia's 

Flash) 

.SSL Corel Flowchart Symbol Library File 

.SSM RealPlay Standard Streming Metafile 

.SSP SAS Transport Data 

Axialis Screensaver [XnView] 

.SSS Sudden Strike Saved Game 

.SST Certificate Store 

Sea Surface Temperature File 

.SSWF Sealed Flash File [Unsealer] 

.SSX ScreenShare Data File 

VersaPro Smart Store Document 

.SSY ScreenShare Compressed Data File (compressed .SSX file) 

.ST SMALLTALK Program File 

Scream Tracker Instrument Library 

Atari ST Disk Image 

NeoPaint Stamp File 

.ST3 MIDI Karaoke File 

.ST4 SBIG CCD Camera ST-4 [XnView] 





.STA Eudora File 

Statistica Spreadsheet 

Spinmaker Plus Stack 

Reflection Saved State 

Brazilian MSX Emulator - BrMSX Saved State 

.STB Genus Stub Library 

.STD Prosa State Transition Diagram Graphic 

SureThing CD Labeler Document File (Labels CDs, DVDs, Jewel Cases, etc.) 

LocoScript Standard Script File 

.STEALTH Likely a text file (e.g., README.STEALTH) 

.STEP AP203 Step File 

.STF ShrinkToFit Compressed Archive File 

Setup Information 

Structured File 

.STG PageKeeper Storage File 

MS ActiveSync (backup of data on mobile device) 

Statistica Graphics File 

Visual Pinball High Scores (and other data: vpreg.stg) 

.STK Personal Stock Monitor File 

.STL Certificate Trust List 

Macromedia Fireworks Style Library 

CAD Software Solid Modeling/Prototyping File 


.STM Sound File

Prosa State Transition Diagram Model 

Scream Tracker v2 Module 

SHTML File (HTML File Containing Server Side Directives) 

SDR99 Speech Recognition Task Time Segment Time Marked File 

PhotoStudio Stamp [XnView] 

.STML Sealed HTML File [Unsealer] 

.STN STiNG File (Iterated Systems resolution-on-demand images) 

.STO Genus Pascal Stub OBJ File 

Infinity Engine Game Storage File 

.STP PageKeeper Packed Storage File 

DART Pro 98 System Settings 

AP203 Step File 

.STR dBase Structure List 

DataPerfect Structure File 

Fifa 2002 Music File 

Sceensaver 

Statistica Report File 

Stream File (Playstation Discs) 

Music File 

.STS MS C Project Status Info 

Scream Tracker Song 

Nimbus 7 SAMS Data File (status data) 

.STT Automap Template 

SureThing CD Labeler User Template File 

.STU Tarantella Enterprise 3 3270 Emulator Style File 

xyALGEBRA File 

.STV sofTV.Author File (Streaming Video Web Authoring) 

.STW SmartTerm Data File 

Statistica Workbook File 

Neopaint Stamp [XnView] 

.STX Simply Tax Form 

EditPlus Syntax File 

SmarText E-book 

SBIG CCD Camera ST-X [XnView] 

.STY Style Sheet (various) 

MS Interactive Music Control 

LaTeX2e Style 

.SUB CloneCd Related File 

Divx Subtitles 

SubmitWolf File (search engine submission program) 

.SUD Super Project Analyzer Data 

.SUI Simple User Interface Toolkit Library 

.SUITE Winstyles Theme (customizes the Windows Desktop) 

.SUL GFA Ray-Trace [XnView] 

.SUM Summary (various) 

.SUMP Easy Palette Gallery or Library 

.SUN Sun Raster Graphic File [XnView] 

.SUNIFF Sun TAAC File [XnView] 

.SUO MS Visual Studio Solution User Options 

.SUP WordPerfect Supplemental Dictionary 

Super Porject Analyzer Project 

.SUR Surveyor Document 

.SV$ AutoCAD Autosave File 

.SV1 Transport Tycoon Saved Game [TT Info] 

.SV4 RollerCoaster Tycoon Saved Game 

.SVB Statistica Macro File 

.SVC Statistica Macro File 

.SVD Word Backup File [Buy Office XP at Shop.Microsoft] 

.SVF WinSFV (Checks for damaged .rar files)

.SVG Word Backup File [Buy Office XP at Shop.Microsoft] 

Scalable Vector Graphics File 

Lode Runner Saved Game 

.SVI Mimio Ink Files 

Red Faction Game File 

.SVL Scramdisk VoLume (Win98 freeware also opened by DriveCrypt) 

.SVO Statistica Macro File 

Transport Tycoon Custom World [TT Info] 

.SVP WISCO Survey Power 

SwiftView Command File 

.SVQ Roland Keyboard Midi Sequence 

InfoBind File Format (encryption format used in Fuji SmartMedia cards to prevent copying) 

.SVS Word Backup File [Buy Office XP at Shop.Microsoft] 

DART Pro 98 Spectral View Settings 

.SVX Interchange File Format, 8SVX/16SV 

Amiga 8SVX Sound 

Statistica Macro File 

.SW Audio File 

Raw Signed Word (16-bit) Data 

SmartWare Spreadsheet (requires login) 


with E] 

.SWA Shockwave Audio File 

SATLOC FreeTrac (GPS Guidance and mapping) 

.SWB PageMaker 7.0 ColorSync Component 

Super Win-EBook 98 File 

Sametime Whiteboard File 

.SWD Storybook File (educational) 

Flash MX File with Debugging Infomation 

Sabiston Textbook 

.SWF Macromedia Flash Format [Alternate] [IrfanView] 

Microsoft Sidewinder (Force Feedback Joysticks) Profile Activator 

.SWFS Dreamweaver File 

.SWG Swag Reader Packet 

.SWI Swish Data File (Swish makes Flash files) 

.SWK Swapkeys Keyboard File 

.SWL Macromedia Flash Format [Alternate] 

.SWP Sprint Backup File 

Swap File 

Spider Writer Project File 

.SWS S-PLUS Workspace 

Swift Generator Instruction File 

SmartWidgets File 

Screen Writer Studio File 

VHDL Simili Sonata Project File 

Science Workshop File 

.SWS0 Screen Writer Studio File Backup 

.SWT VB Setup Wizard Template File 

Macromedia Authoring Flash File 

Swift Generator Template File 

Space Watch Pro Data File 

.SXC OpenOffice.org Spreadsheet File 

.SXD OpenOffice.org Draw File 

.SXF Secure eXchange Format File (Phocis Licensing Client) 

.SXG OpenOffice.org Writer 6.0 Master Document 

.SXI OpenOffice.org Presentation File 

.SXLS Sealed Excel File [Unsealer] 

.SXM OpenOffice.org Math File 

.SXP OpenOffice.org Presentation File 

.SXW OpenOffice.org Writer 6.0 Text File

Staroffice Word Document 

.SY# Darn! Backup Files 

.SY1 Ami Pro Smartpix Symbol Library 

.SY3 Harvard Symbol File (Harvard Graphics taken over by Serif) 

.SYD Sysedit Backup File 

.SYL SYLK Spreadsheet Format 

.SYM Symbol Table (various) 

Borland C++ Precompiled Headers 

.SYN Synonym File 

TextPad Syntax Definition 

SDSC Image Tool File 

Breakneck / N.I.C.E.2 Archive [Dragon UnPACKer] 

Excessive Speed Archive [Dragon UnPACKer] 

Synthetic Universe [XnView] 

.SYNU Synthetic Universe [XnView] 

.SYS System Configuration 

System Device Driver 

.SYW Harvard Symbol Graphic (Harvard Graphics taken over by Serif) 

Yamaha SY-series Wave Files 

.SYX SysEx MIDI File 

.SZ0 Binary File Format (used when uploading via a COM port) 

TTTTTTTTTTTTTTTTTTT http://pulsar.sitemynet.com 

.T Tads Source File 

Turing Programming Language File 

TAR Tape Archive Without Compression 

.T_1 Polytext Ma'archot Meida Co. S"TaM ("Sifriyah Toranit M'muchshevet" - Computerized Torah Library) 

.T?? Ingres Table/Index File (?? = Hex 00 to FF) 

RAR Compressed File (?? can be 01 to 99 after .S99) 

.T1 Male MRI [XnView] 


with E] 

.T2 Male MRI [XnView] 

.T2K Teach2000 Document 

.T2T Sonata CAD Modelling File 

.T64 C64S Emulator Program 

.T98 Kiplinger Tax Cut File (1998 Tax Year) 

.T99 Kiplinger Tax Cut File (1999 Tax Year) 

(Note: Kiplinger Tax Cut State Return Files are of the form .T?? 

where ?? is the two-character state designation.) 

.TAAC Sun TAAC File [XnView] 

.TAB Guitar Tablature File [On-line Guitar Archive] 

MapInfo Table 

Diabetes Mentor File 

.TAF Birdstep Technologies RDM Database (may be embedded in other software) 

.TAG Dataflex Query Tag Name 

.TARGA Truevision Targa Bitmap [XnView] 

.TAH Turbo Assembler Help File 

.TAI INMOS Transputer Development System Occam Analyse Info 

.TAL Adobe TypeAlign Text Illustration File 

Typed Assembly Language File 

.TAM Tame Program Settings 

.TAO IsoBuster File 

.TAR Compressed Archive File 

.TAX Turbotax File 

.TAZ Compressed File (short for .tar.z) 

.TB1 Turbo C Font

.TB2 Turbo C Font 

.TBA PASSOLO Licensed Translation Bundle (Software localization: translation, etc.) 

.TBALIC400 PASSOLO Translation Bundle (Software localization: translation, etc.) 

.TBB The Bat! E-mail Hives 

.TBC IronCAD Tool Bar Customization 

Inovate Tool Bar Customization 

.TBE TMPGEnc List File (video editing) 

.TBF Imavox TurboFax Faxs 

Trellian Button Factory File 

.TBG TeamBG File (modify Infinity Engine games) 

.TBI The Bat! Hive Index 

.TBK Memo Backup (database programs) 

Asymetrix Toolbook 

The Bat! Backup Hives 

.TBL Adobe Pagemaker Import Mapping Table 

OS/2 Table of Values 

.TBP TAS Books Accounts 

.TBPA Tektronix Bluetooth Protocol Analyzer 

.TBR SoftQuad XMetaL Toolbar/Menu Configuration 

.TBT TabIt (Guitar Tablature Editor) 

.TBU PASSOLO Translation Bundle (Unicode) (Software localization: translation, etc.) 

.TBULIC400 PASSOLO Translation Bundle (Unicode) (Software localization: translation, etc.) 

.TBX Project Scheduler Table 

.TC Borland Configurations File 

.TCF Theme Park World Game File 

.TCH Borland Help File 

.TCI INMOS Transputer Development System Occam Configuration Info 

.TCL TCL/TK Language Script 

TextPad Clip Library 

SLIDE: Scene Language for Interactive Dynamic Environments File 

.TCM INMOS Transputer Development System Occam Comment Text File 

.TCT Championship Manager Game File 

TurboCAD Template 

.TCW TurboCAD Drawing 

.TCX TurboCAD Drawing as Text 

.TD Turbo Debugger Configuration File 

.TD2 Turbo Debugger Configuration File 

.TD4 RollerCoaster Tycoon Track Design 

ThumbsPlus Version 4.x+ Graphics Database 

.TDA Palm Date Book File 

.TDB Thumbs Plus Database 

.TDF Trace Definition File 

TheDraw Font 

Typeface Definition File (for fonts) 

.TDH Turbo Debugger Help File 

.TDI Explore (TDI) & Maya [XnView] 

.TDIM Digital F/X [XnView] 

.TDK Turbo Debugger Keyboard Record 

.TDL FOCUS Three Dimensional Look File 

.TDO Compressed File 

.TDP Serif DrawPlus Thumbnail 

.TDS Turbo Debugger Symbol Table 

.TDT Daylight Fingerprint Data File 

ASCII Data File in CSV Format (various) 

.TDW Turbo Debugger Configuration File 

.TDY TODAY or BuildPro Application File 

.TE Textease File 

.TE2 Conquest of the New World 

.TEA Tea Template Source File 

.TED Tribes 2 Game File

.TEE TeeChart Office Graphic 

.TEF Relisys Tefax Fax 

TablEdit (creating, editing, printing and listening to tablature) 

.TEL Telnet Host File 

.TEM Icon Author Template 

Turbo Editor Macro Language 

Badge Designer 2000 File 

.TEMP Audiogalaxy Downloading Music File (file renamed when download complete) 

.TER TerraGen Landscape File 

Daylon Leveller Heightfield Data 

.TET Textease Template 

.TEX TeX 

LaTeX File 

Mackichan Scientific Notebook File 

PaintShop Pro Texture [XnView] 

Texture File (various) [usually a renamed .BMP file and may be in special directory] 

Idealist Datasheet 

Concordance Full Text Database File 

.TEXT ASCII Text File (use any editor to open) 

.TF Turbo Profiler Configuration File 

.TFA Turbo Profiler Area File 

.TFC Tobi's Floppy Cataloguer Catalog 

.TFH Turbo Profiler Help File 

.TFM Tagged Font Metric 

TeX Font Metric File 

Toplevel Form File 

.TFR Star Wars - Tie Fighter Game-Pilot File 

IBM Client Access File Transfer 

4D Database Windows Formula Document 

Time-Frequency Representation (Frequency analysis) 

.TFS Turbo Profiler Statistic 

.TFW Digital Raster Graphic World 

.TFX Traffix Traffic Analysis Software 

.TG1 On Target Project File 

.TG4 CCITT Group 4 Fax [XnView] 

.TGA Truevision Targa Graphic [XnView] [IrfanView] 

(Used by some game programs -- sometimes called texture files) 

.TGD Nimbus 7 SAMS Data File (gridded temperature data) 

.TGH Tiliagraph File (Stratigraphic Diagram Software) 

.TGH TrueGas Host File 

.TGM Nem's Mega 3D Terrain Generator 

.TGW Terragen Atmosphere File 

.TGZ UNIX Tar File Zipped (short for .tar.gz) 

.THB KinuPix Skin [XnView] 

.THD Thread 

.THEME Microsoft Plus! Theme File 

.THM MS Clipart Gallery Database 

Serif DrawPlus Theme 

.THN Graphics Workshop for Windows Thumbnail 

.THP TurboTax-related File 

LiveMath Plug-in 

.THR PROGNOSIS Threshold Document File 

.THS WordPerfect Thesaurus 

.THU Command and Conquer Renegade File 

.TIB Acronis True Image (hard drive partition manager) 

.TIC Lotto Pro 2002 Ticket 

Arcinfo Coordinates File (GIS-related file) 

.TIE X-wing Alliance Game File 

.TIF Tagged Image Format File [XnView] [IrfanView] [SwiftView] 

Digital Raster Graphic Image

.TIFF Tagged Image Format File [XnView] [IrfanView] [SwiftView] 

.TIG Tiger Government Map File 

.TIK Script File for Game Textures (ASCII file) 

.TIL Togai InfraLogic Fuzzy-C Knowledge Base 

Buttonz & Tilez Texture [XnView] 

Tilia File 

.TIM Playstation Game Texture Image [XnView] 

The Incredible Machine Level File 

TIFF Image (rev 6) [XnView] 

.TIP Startup Tip File (various) 

.TIS MahJongg Tile Set 

.TIX Hybrid Graphics File (both vector and raster data) 

ASA for UNIX Terminfo Extension File 

Tix Widgets 

DivX File 

.TK TK Solver File 

.TK2 Take Two/Easy CD Creator Backup 

.TKB TicketBench Data File (design/print tickets) 

.TKM Panasonic SD Voice Editor File 

.TJF VAXTPU Backup File (VAXTPU is default OpenVMS editor) 

.TKN Liberty BASIC Application Distribution File 

.TKT TK Solver File 

.TKW TK Solver File 

.TLB Remote Automation Truelib Files 

OLE Type Library 

Visual C++ Type Library 

VAX Text Library 

Bubble Chamber Reference Table 

.TLC Swat Compiled Tood Command Language Source 

.TLD Trellix File 

.TLE NASA Two-Line Element Set 

.TLF Turnpike SCORE Link File 

Avant! Memory Compiler Memory Models Format File 

Gear Track List File (CD burning) (Used to be .CUE; just rename .CUE to .TLF) 

Short Message Service File (GSM phone messaging) 

.TLG Trellix WebGem 

.TLK Hand of Fate Archive [Dragon UnPACKer] 

Lands of Lore Archive [Dragon UnPACKer] 

.TLP MS Project Timeline File 

.TLS Timeless Time & Expense 

.TLT Trellix Web Design File 

TList Data File 

.TLX Telex 

Trellix Data File 

.TMA DCI TradeManager Catalog Archive 

.TMB Timbuktu Pro Connection Document (remote control software) 

.TMC DCI TradeManager Catalog Archive 

.TMF WordPerfect Tagged Font Metric File 

.TMG The Marketing Game File 

.TMO Zortech C++ Global Optimizer Output File 

.TMP Temporary File/Folder 

.TMQ TestMaster File 

.TMR Simpsons Cartoon Studio File 

.TMS Telemate Script 

.TN1 Tiny [XnView] 



.TNC SuperJPG ThumbNail Cache File 

.TNEF Transport Neutral Encapsulation Format File 

.TNF Transport Neutral Encapsulation Format File

.TNK OMEGA Tank File (Origin Systems game no longer marketed) [Info] 

Nimbus 7 SAMS Data File (pre-launch calibration data) 

TrunkTrac Scanner Info 

.TNL Thumbnail [XnView] 

.TNY Tiny [XnView] 

.TOC Eudora Table Of Contents 

.TOL Kodak Photoenhancer 

.TOP INMOS Transputer Development System Occam Top Level File 

QuickVerse File (Bible reading program) 

.TOS Atari Exe cutable (TOS = The Operating System - Sometimes an archive) 

.TOT Telelogic Option Templates 

.TP Turbo Pascal Configuration File 

Turbo Profiler Session-state File 

EROSION 3D Relief Parameters [Format (pdf)] 

.TP3 Harvard Template (Harvard Graphics taken over by Serif) 

.TP4 RollerCoaster Tycoon Track Design Screenshot 

.TPB HiJaak PCL Soft Font File Backup 

.TPF HiJaak PCL Soft Font File 

.TPH Turbo Pascal Help File 

.TPI Visual Test Shell File (tests BACnet function of building automation equipment) [Also called EPICS 

(electronic protocol implementation conformance statement)] 

.TPJ TestStand Project 

.TPL Turbo Pascal Resident Units 

Harvard Template (Harvard Graphics taken over by Serif) 

fKey Template Designer Template File 

NoteTab Template 

CakeWalk Audio Template File 

DataCAD Template File 

Canvas 7 Template 

Timeslips TSImport Template 

Adobe Photoshop Tool Preset File 

MS Access Workflow Designer 

TextBridge Template 

.TPM TextPad Macro 

.TPP Turbo Pascal Protected Mode Units 

Teleport Pro Project (Web spider) 

TypePlus File 

.TPR GROMACS 3.0 Molecular Dynamics Simulator File 

Together Project Definition 

TMPEG Enc Video Conversion Project File 

.TPS Clarion for Windows Data File 

.TPU Turbo Pascal Unit 

VAXTPU Command File (VAXTPU is default OpenVMS editor) 

.TPW Turbo Pascal Unit 

Turbo Profiler Session-state File 

.TPZ Compressed File (short for .tar.gz) 

.TR Turbo Debugger Session-state Settings 

Manual Page Input to UNIX troff -man Command 

.TR2 Turbo Debugger Session-state Settings 

.TR5 Tree Professional File 

.TRC Power CTrace Debug Support File 

Oracle SQL*Net Trace Debug File 

True BASIC Compiled Code 

.TRE PC Tools Directory Tree 

VisiRex SDK Tree Function File 

Kith and Kin Export File (document/store family trees) 

TreeAge Decision Tree File 

Wing Commander Series Movie/Game File 

EA SPORTS File 

.TRF DocuMagix File

.TRG Symantec LiveUpdate File 

.TRI Trigram File 

.TRK Kermit Script File 

Mixman Studio Track 

Train Dispatcher Railroad Centgralized Traffic Control Simulation 

.TRM Terminal Settings (various) 

TRiM High-compression Lossless 8 to 32 bit Truecolor Image File 

.TRN Quattro Translation 


STN Express Transcript Text File (search science databases through STN®) 

MS SQL Server Transaction Backup 

TextBridge Training Data 

MKS Source Integrity Project Log 

.TRO Anti-Trojan File 

.TRP Tripmaker File 

.TRS Micrografx Executable File 

EROSION 3D Temporal Event File [Format (pdf)] 

.TRT Team Sports Scheduling System Report Template 

.TRU True BASIC Source Code 

TruSys System Comparison File 

.TRW Turbo Debugger Session-state Settings 

.TRX Emerald PC Authorize Batch Transaction File 

PASSOLO Translation File (Software localization: translation, etc.) 

.TS Tune Smithy File 

.TSC Top Secret Crypto File 

.TSCE TextShield Zip-compressed .RTF File (TextShield Compression Engine) 

.TSK Skins (Themes) for Pocket PC PDAs 

PhotoImpact Quick Command 

.TSL Borland TeamSource File 

.TSP Windows Telephony Service Provider 

.TSR INMOS Transputer Development System Occam Program Source 

.TSS Team Sports Scheduling System Project File 

.TST WordPerfect Printer Test File 

TextShield Template 

Test File 

.TSW TestStand Workspace 

.TSX Team Sports Scheduling System XML Project File 

.TT ThinkTank Outliner (old Apple program) 

.TTC TrueType Compressed Font 

.TTF TrueType Font 

.TTK Alchemy Catalyst Translation Toolkit (purchased from Corel) 

.TTL Tera Term Macro File 

.TTO IBM Client Access File Transfer Description 

.TTP Telelogic Tau Project 

Atari TOS Executable With Parameters (TOS-Takes-Parameters) 

.TTR TeeTree Office File 

.TTW Telelogic Tau Workspace 

.TTX Crystal Report Data Connection File 

.TUB PaintShop Pro Tube File [XnView] 

.TUD Thumbs Plus Viewer Graphics 

.TUO Thumbs Plus Viewer Graphics 

.TUT Tutorial 

.TV Paradox Table View Settings 

.TV1 WordPerfect Overflow File Above Doc 1 Insert Point (can be 1-9) 

.TV4 TValue File (Amortization and time-value-of-money calculations) 

.TVM TVMconv 

.TVO TeveoLive (video recording) 

.TVP NVIDIA Graphic Card Update File 

.TVS VectorMAX Streaming Video 

.TVT RealPlayer

.TVVI InterVideo WInDVR 

.TWC Tripwire Configuration File (intrusion detection) 

.TWD Simtech MindMapper Mind Map 

.TWE ThinkWave Educator Data File 

.TWF TabWorks File 

Georeferenced Information File 

.TWG ThatWaltGuy Web Server File 

.TWP Toplevel Computing Fine Words (DOS Word Processor) 

Tripwire Policy File (intrusion detection) 

.TWR Tripwire Report File (intrusion detection) 

.TWS TextPad Workspace File 

Tripwire Schedule File (intrusion detection) 

.TWW Tagwrite Template 

.TX8 DOS Text File 

.TXB Descent/D2 Encoded Briefing File 

.TXC Urban Chaos Game File 

.TXD Grand Theft Auto 3 Texture File [ResHack to veiw and modify] 

.TXF Compressed File (short for .tar.f) 

.TXI TeX Support File 

.TXL Genesis3D Texture File 

.TXM DATAIR Pension Reporter Data File 

.TXT Text File (open in Notepad, WordPad, Word, or many other programs) 

.TXW Yamaha TX16W Wave Files [Linux Player] 

.TXX DataPerfect Text Storage 

.TYM PageMaker Time Stamp 

.TZ Compressed File (short for .tar.z) 

Ingres Time Zone File 

.TZB Compressed File (short for .tar.z.btoa) 

UUUUUUUUUUUUUUUUUUUUUUU http://pulsar.sitemynet.com 

.U Unreal System File 

.U2 Telelogic Tau UML Model 

.U2E Unreal Game Translation 

.U2P Telelogic Tau UML Program Text File 

.U8 Raw Unsigned 8-Bit Audio Data 

.U96 EasyZip Temporary File 

.UAP User Agent Wireless Telephony Profile 

.UAX Unreal Audio File 

.UB Audio File 

Raw Unsigned Byte (8-bit) Data 

.UC2 Compressed File 

.UCF Xilinx Foundation User Constraint File 

.UCM Urban Chaos Game File 

.UCN Compressed Archive 

.UCS Universal Classification Standard Database File 

.UDB PINO 3-Server File 

Win2000 Uniqueness Database File (used in setup--provides answers that override defaults for unattended 

installs) 

.UDC Acrobat Spelling File 

.UDF MS Excel User Defined Function 

Photostyler Image Filter 

.UDL MS Data Link 

.UDS Sierra Generations Family File (program no longer supported) 

.UDW Raw Unsigned DoubleWord (32-bit) Data 

.UE2 Encrypted Archive 

.UFF DataWave Physiological Data File 

.UFO Ulead Object File

.UG Drawing File (various) 

.UH MS Age of Kings File 

.UHA UHARC Compressed Archive [Download Link] 

.UHS Universal Hint System File 

.UHTM Unreal Tournament File 

.UI User Interface 

Geoworks UI Compiler Espire Source 

.UIF WordPerfect Long Prompts 

.UIH Geoworks UI Compiler Espire Header 

.UIS WindowBlinds Skin (changes the look and feel of WindowsXP) 

.UL uLAW Audio File 

.ULD Procomm Uploaded Files 

.ULP Peugeot Diag 2000 File (vehicle diagnostic equipment) 

.ULS Internet Location Service 

.ULT UltraTracker Music Module 

.ULW ULAW - Sun/NeXT 

.UMB MemMaker Backup Archive 

.UMI CDDB Database and PC Music Library in PlayCenter 

.UMOD Unreal Self-extracting MOD File 

Unreal Tournament 

.UMX Unreal Music File 

.UNF Btreive Unformatted File 

.UNI MikMod (UniMod) Format 

Forcast Pro Data File 

.UNL Informix Binary File Created by UNLOAD Command 

.UNQ Fax View File (unverified) 

.UNR Unreal Map File 

.UNX Text File (usually UNIX) 

.UNV BusinessObjects/WebIntelligence Universe File (End-user query analysis/reporting tool) 

.UOL PhotoImpact Object Library File 

.UPD dBase Update File 

ProUpdater Per/Directory Options Setting File 

Universal Print Driver (cross-platform) 

Updated Program Data (various) 

.UPI ULead Photo Impact Program File [XnView] 

.UPJ ULead Project File 

.UPO dBase Compiled Update File 

.UPR FileMaker User Spelling Dictionary 

.UPX ULead Photo Express Saved Image File 

.URF Radar ViewPoint Universal Radar Format 

.URL Internet Location 

.URT Utah Raster Image [XnView] 

.USA Unreal Saved Game File 

.USB D-Link FM Radio Update 

USB Protocol Analyzer Trace (USBChief, USBAdvisor, USBTracer) 

.USE MKS Source Integrity File 

.USERPROFILE Symantec Live Update User Profile 

.USL LaserJet Landscape Font 

.USP PageMaker Printer Font 

LaserJet Portrait Font 

.USR User Database (various) 

.UTF AOL Updating Files (found in TOD [Tools on Demand] folder) 

.UTL Sound File 

.UTP BinPatch Patch Data File 

.UTX Unreal Texture File 

Unicode File (editor: UniPad) 

.UU Compressed Archive File (UUENCODE) [Tutorial] 

.UUD Uudecoded [Tutorial] 

.UUE Uuencoded [Tutorial] 

.UV2 Jane's Combat Simulations F-15

.UVR Ulead Cool 360 Viewer File 

.UVW geoManager/geoInterface User View 

.UW Audio File 

Raw Unsigned Word (16-bit) Data 

Unitype GlobalWriter File 

.UWF UltraTracker Wave File 

.UWL WordPerfect User Word List 

.UZE Ultimate Zip Compresion Agent 

.UZR UZR 3D Streamable 3D File Format 

VVVVVVVVVVVVVVVVVVVVV http://pulsar.sitemynet.com 

.V Verilog File [Icarus] 

ReaGeniX Code Generator Consistency Check Support File 

Vivid Main Input File 

.V$$ Cheyenne/Inoculan AntiVirus Temporary File (reboot then delete - product no longer supported) 

.V2D VersaCAD File 

.V3D Vecta3D Model File 

.V4W V.I.S.A (Visual Interactive Sensitivity Analysis - decision analysis software) 

.V64 Nintento 64® Emulation ROM Image (to run search for the Nintendo emulator program of your choice) 

.V8 Covox 8-bit Audio 

.VAD Mapper Variant File (program for taking an adjudication from a diplomacy judge) 

.VAG Sony PlayStation ADPCM Sound File 

.VAL Paradox Validity Checks 

dBase Values 

.VAM Velazquez Application Map 

.VAN VistaPro Animation 

.VAP Annotated Speech 

.VAR Icon Author Variable 

Sterling Software Data Dictionary File Sterling merged with Computer Associates. 

.VB VBScript File or Any VisualBasic Source 

.VBA VBase File 

.VBD ActiveX File 

.VBDOC VBdocman Configuration File 

.VBDT VBdocman Documentation Template 

.VBE VBScript Encoded Script File 

.VBG Visual Basic Group Project 

.VBK VisualCADD Backup File [Support Group] 

.VBL User Control Licensing File 

.VBN Norton Corporate Anti-Virus Quarantined File (Caution: file may be infected) 

.VBOXLM Aladdin Knowledge Systems Vbox File (software distribution) 

.VBP Visual Basic Project 

.VBR Remote Automation Registration Files 

.VBS VBScript Script File 

.VBW Visual Basic Project Workplace 

.VBX Visual Basic Extension 

.VBZ Wizard Launch File 

.VC VisiCalc Spreadsheet File 

.VCC VersaCheck Style 

.VCD VisualCADD Drawing File [Support Group] 

Virtual CD-ROM 

.VCE Natural MicroSystems Voice File 

.VCEL Vertex Color And Edge List File 

.VCF vCard File 

Vevi Configuration File 

VP HybridCAD Native Format 

.VCH Interlock Public Computer Utility

.VCI VP HybridCAD Native Format 

Visicontrol Compressed Image File 

.VCL Roxio Video CD Layout 

.VCM Visual Component File 

.VCPREF Symantec Live Advisor Preferences 

.VCR ATI Video Recorder File (may require ATI video card to play) 

.VCS MS Outlook vCalendar File [Buy Office XP at Shop.Microsoft] 

Video Clipstream Video File 

.VCT FoxPro Class Library 

MindVision Installer Vise (creates software installers) 

.VCW MS Visual C++ Workbench Information File 

.VCX FoxPro Class Library 

Spreadsheet File 

.VDA Targa Bitmap 

CAD File (federation of the automobile industry surfaces interface file) 

Video Display Adapter [XnView] 

.VDB Norton AntiVirus Corporate Edition Update File 

PC-cillin Quarantined File 

.VDF AntiVir Virus Definition File 

Vexira Anti-virus Virus Definition File 

.VDM VDM Play (VideoSwitch digital CCTV recording) 

.VDO VDOScript File 

.VDR ComputerEasy Draw File 

.VDT VersaPro Variable Declaration Table 

.VDX XML for Visio Drawing File 

Vector Graphic File 

VMM32.VDX: system driver that checks duplicate .VXD files and switches to protected mode 

Virtual Device Driver (also see .VXD) 

.VEE HP VEE Project File (visual environment for microelectric circuits) 

.VEG Sonic Foundry Vegas Video Project 

.VEM Voice E-mail File [Free Player] 

VeePro Embroidery Software Format 

.VENUE VenueBench Data File (design/print reserved seating tickets) 

.VEW Clipper Viewfile 

Lotus Approach View File 

Novel Groupwise E-mail View File 

.VF Video Factory File (unverified) 

.VFB VForm Builder 

.VFF Sun TAAC File [XnView] 

.VFM Voter Voting Form 

.VFN Voter Customer Voting Form 

.VFW Video for Windows 

.VGA VGA Screen Driver 

Targa Bitmap 

.VGD Generic CADD VGA Driver 

.VGM Video Game Music File Format [VGM Tools ] 

.VGR Ventura Graphic 

.VGS Virtual Game Station Memory Card Save 

.VHA Macromedia Sitespring File 

.VHD VHDL Design File (text file used in design projects) 

.VHDL VHDL Design File (text file used in design projects) 

.VI LabView File 

Jovian Logic VI Graphics [XnView] 

.VIB Chemsoft® Export/Import MSDS Data 

.VIC Vicar Picture File [XnView] 

.VICAR Vicar Picture File [XnView] 

.VID Monitor Control File 

Media Player Video 

Screen Driver 

Quicktime Video

MS-DOS 5 Shell Monitor File 

Vidcom 64 [XnView] 

.VIF Khoros Visualization Image File [XnView] 

Verity [XnView] 

.VIFF Khoros Visualization Image File [XnView] 

.VIK Viking Picture File 

.VIM VIM (Vi IMproved) Editor File 

.VIR Virus Infected File (renamed by Symantec Anti-Virus) 

.VIS Picture File 

.VIT LabView File 

VITec [XnView] 

.VIV VivoActive Player Video File 

.VIZ Division dVS/dVISE File 

.VJS Quicktime Music File 

.VL2 Tribes 2 Game (actually a ZIP file) 

.VLB Corel Ventura Library 

.VLD DataFlex Variable Length Data File 

.VLM Vellum CAD Drawing 

Ashlar-Vellum File 

.VLT Darn! Passwords! Vault File 

.VM Geoworks Virtual Memory File 

.VM1 Panasonic SD Voice Editor File 

.VMC Acrobat Virtual Memory File 

.VMDC VMware Virtual Disk File 

.VMDK VMware Virtual Disk File 

.VMF Ventura Font Characteristics 

FaxWorks Audio File 

.VMI Dreamcast Download Info File (short file with download info in it) 

.VMO Siemens Sl45 Mobile Phone Voice File 

Virtools Behavioral Server Composition (Web-based Protected Format) 

Cosmopolitan Virtual Makeover File 

.VMP Logos Library System 2.x Verse Map 

.VMR VBMaximizer File 

.VMS Sega Dreamcast VMU Save File (download file --requires .VMI file to point to it) 


.VMX VMware Configuration File 

VectorMAX Streaming Video 

.VMX2 VectorMAX Streaming Video 

.VMX3 VectorMAX Streaming Video 

.VNA JVC JLIP (controls transfer images from digital camcorders) 

.VNC Virtual Network Computing 

.VNS Visual Net Server File (Web and XML Application Server) 

.VO Vivid Include File 

.VOB DVD Video Movie File (MPEG-2 program streams with additional info) 

Vue d'esprit [XnView] 

.VOC Quartet Audio File 

Creative Labs Sound 


.VOF VZ Programmer Object Folder 

.VOID Halflife Map Voids File 

.VOL Tribes 2 Game File 

Earth Siege 2 Archive [Dragon UnPACKer] 

Giants: Citizen Kabuto Archive [Dragon UnPACKer] 

Tribes Archive [Dragon UnPACKer] 

Tribes Extreme Archive [Dragon UnPACKer] 

.VOX Vox Audio 

Dialogic ADPCM 

Talking Technology Inc. File 

Natural MicroSystmes Voice File 

.VP Ventura Publisher File

Freespace Archive [Dragon UnPACKer] 

Freespace 2 Archive [Dragon UnPACKer] 

.VPA Excite Chat Gestures File 

.VPB Quantel VPB Graphic [XnView] 

.VPD VitaGraph File (medical testing related) 

Virpet Performance Descriptor 

.VPG VPGraphics File 

.VPP Virtual Pool Game (unverified) 

Red Faction/Summoner Package File 

.VPS Visual Pinball Script (external file loaded by .VPT file) 

.VPT Visual Pinball Table 

.VQE Yamaha Sound-VQ Locator File 

.VQF Yamaha Sound-VQ File 

.VQL Yamaha Sound-VQ Locator File 

.VRC SATLOC VRC (Variable Rate Control) 

.VRD VRScape Virtual Reality Model Loader 

.VRF Oracle 7 Configuration File 

.VRM Quattro Pro Overlay File 

.VRO Panasonic DVD Recorder File 

.VRP Watcom Project File 

.VRS WordPerfect Graphics Driver 

.VS Vivid Include File (Surface definition) 

.VS2 Roland-Bass Transfer File 

.VSD Visio Drawing 

.VSDISCO SOAP Dynamic Discovery File (MS SOAP & .NET apps) 

.VSL GetRight Download List File 

.VSM VisSim Simulation Model 

.VSP Virtusales ASP Compiler Project File 

SPX Sprite 

.VSS Visio Stencil 

Shapeware Visio Smartshapes File 

.VST Visio Template 

Truevision Vista Graphic [XnView] 

Targa Bitmap 

.VSW Visio Workspace File 

.VSX XML for Visio Stencil File 

.VSY VNC Spy (VNC host connection manager) 

.VT Linux VT100 File (use cat command to view) 

.VTC ReliaSoft ALTA 6 & Weibull++ 6 & BlockSim (ReliaSoft's Reliability Software) 

.VTD Custom Virtual Device Driver (.VXD) 

.VTM Cold Fusion Studio Query 

.VTX XML for Visio Template File 

.VUE dBase or Foxpro View 

3D Studio Animation 

.VVF ViVerify Fingerprint 

.VVP Visual Voice Project File 

.VVR ViVerify Repair 

.VVT VersaPro Variable View Table 

.VW Volkswriter Text File 

Lightscape View 

.VWF CADvance Drawing File 

.VWL MGI VideoWave Video Wave Library (MGI to be bought by Roxio) 

.VWR PC Tools File Viewer 

.VWT MGI VideoWave Video Wave Thumbnail (MGI to be bought by Roxio) 

.VX EARS Component File (EARS = UK Liberal Democrats Election Agents Record System) [Filename 

starts with E] 

.VXD Virtual Device Driver (also see .VDX), also called... 

Value-added Driver 

.VXML VoiceXML Source File 

.VXS Voice Xpress User Profile

.VYD VyperHelp (Hypertext/help editor and converter) 

WWWWWWWWWWWWWWWWWW http://pulsar.sitemynet.com 

.W Applause Word Chart 

Progress Database File 

.W?? Divided Compressed File (?? = 01 to 99; used when installs needed to be on individual floppy disks) 

.W14 Genesis 2000 File 

.W30 Ventura Printer Font 

.W31 Windows 3.1 Startup File 

.W3D Black Belt Systems Ray Trace Control File 

.W3G Warcraft III File 

.W3M Warcraft III Map File 

.W40 Win95 Backup File 

.W44 dBase Temporary File 

.W64 Sonic Foundry Video Editor Wave64 File 

.WAB MS Outlook Address Book [Buy Office XP at Shop.Microsoft] 

.WAD Doom Game File [WAD Editor] [Dragon UnPACKer] 

(Also used for other games) 

Gunman Chronicle Archive [Dragon UnPACKer] 

Half Life Archive [Dragon UnPACKer] 

Heretic Archive [Dragon UnPACKer] 

Hexen Archive [Dragon UnPACKer] 

Quake Archive [Dragon UnPACKer] 

Theme Park World Archive [Dragon UnPACKer] 

Half-Life Texture File 

.WAF Mayim's WAF Compiler File (3D content for display in Walkabout plug-in) 

.WAG Urban Chaos Saved Game File 

.WAL WalMaster Showlist File 

Quake 2 Texture File [XnView] 

Winamp3 Skin Format 

.WAR Archived Konqeror (KDE) HTML Page 

Java Web Archive 

.WAS Procomm Plus Script Source Code File 

.WAV Waveform Audio (PCM Wave) [IrfanView] 


.WAX Procomm Plus Compiled Script File 

Metafile (points to Windows Media Video [.WMA] file) 

.WB Dictionary Project Data File 

.WB1 QuattroPro for Windows 



.WBA Winace Zip File 

WindowBlinds Compressed Skin (changes the look and feel of WindowsXP) 

.WBC Webshots Picture Collection (library) 

.WBD Webshots Graphic Format 

.WBF Windows Batch File 

.WBI White Blotter, Inc. Advanced Code Editor 

.WBK Word Backup [Buy Office XP at Shop.Microsoft] 

WordPerfect Workbook 

.WBL Argo WebLoad II Upload File 

.WBM Webmin Module (Linux) 

WinBatch File 

Wireless Bitmap File (WML-related file) [Tutorial] 

Macromedia Fireworks File

.WBMP Wireless Bitmap File (WML-related file) [Tutorial] 

Macromedia Fireworks File 

.WBR Crick WordBar File 

.WBS WebExpress Website File 

WinBot IRC Client Script 

Webshots Screensaver 

.WBT WinBatch Script 

Crick Wordbar Template 

.WBX Webigger File 

.WBZ WebShots File [MIME Type: application/x-webshots] 

.WCD WordPerfect Macro Token List 

.WCFG WildTangent Configuration 

.WCI Catalog File Maintained by MS Indexing Service (CATALOG.WCI) 

.WCM Works File Transmission 

WordPerfect Macro 

.WCP WordPerfect Product Info 

.WCR Ergane Configuration File (dictionary) 

.WCS Website Content Source 

.WCT WorldCast Project 

.WD2 WordExpress Document 

Info Select for Palm Organizer File 

.WDA RUMBA® OFFICE 95/N Configuration File 

.WDAT WildTangent Data File 

.WDB Works Database 

.WDF Workshare DeltaView DeltaFile (difference between two documents) 

ReliaSoft Weibull 5.0 (Life Data Analysis Software) 

.WDG ReliaSoft Weibull 4 (Life Data Analysis Software) 

.WDK WhizFolder Desktop File 

.WDL Windows XP Watchdog Log File 

3D Game Studio Window Definition File (this one is free) 

3D GameStudio World Definition Language File (this one you pay for) 

.WDR Star Wars - Tie Fighter Media 

.WEB Web Vector Graphic File 

Corel Xara Web Document 

XaraX Web Document 

.WEBPNP MS Support for Internet Printing 

.WF1 EViews Workfile (Econometric software) 

.WFA WinFax Pro Archive 

.WFB Turtle Beach WaveFront Bank 

.WFD Turtle Beach WaveFront Drum Set 

.WFL Ultimus Workflow Suite Workflow File 

.WFM dBase Form Designer Form Object 

.WFN Corel Symbols and Fonts 

.WFP Turtle Beach WaveFront Program 

.WFS Windows Installation Script 

.WFX Winfax Data File 

.WG1 Lotus 1-2-3 Worksheet 

.WG2 Lotus 1-2-3 Worksheet 

.WGF WaterGuide File (Decision Support System Water Reuse) 

.WGP Wild Board Games File 

.WGS WGS File Generator Web Segment File 

.WGT Worms Armageddon Teams File 

.WHT MS NetMeeting Old Whiteboard Document 

.WI Wavelet Image (different compression for JPEG) [Info resource] 

.WIC wIntegrate File 

J Wavelet Image Codec [XnView] 

.WID Ventura Width Table 

.WIF Weaving Information Format 

Wavelet Image File 

Wang Image File (fax related usually)

.WIL Windows Interface Language Script 

WinImage File (Floppy and disk imager) 

.WIN dBase or Foxpro Window 

Wonderware InTouch Window 

Windows Backup File 

Normalised Extinction Corrected Differential Photometry with Tapered Ends 

.WINI WildTangent Configuration File 

.WINWARE WinWare Windows Applet (general purpose mini-applications) 

.WIP Windows Installer Project (opens with MS Visual Studio Installer) 

.WIRE Alias Wavefront Studio Wireframe 

.WIS wIntegrate Basic Script File 

.WIZ Wizard File [MS Publisher and Word] 

.WJP WildTangent Branded .JPG File 

.WK! Lotus Spreadsheet File 

.WK1 Lotus Spreadsheet File 



.WKB WordPerfect Document 

.WKB Workbook 

.WKE Lotus Educational Version Spreadsheet File 

.WKQ Quattro Spreadsheet 

.WKS Lotus Spreadsheet File 

XLISP Workspace 

MS Works Spreadsheet 

.WKZ Compressed Spreadsheet 

.WL WISCO Word Power (Vocabulary Activities) 

.WL1 File for Shareware Version of Wolfenstein 3D 

.WL6 File for Registered Version of Wolfenstein 3D 

.WLD REND386/AVRIL File 

.WLF Argo WebLoad I Upload File 

.WLG Dr. Watson Log 

.WLK Virtus Walkthrough Graphics 

.WLL Word Add-in [Buy Office XP at Shop.Microsoft] 

The Sims (Maxis) Wall Texture File 

.WLM CompW [XnView] 

.WLR VRML Page 

.WLS 602 pro PC SUITE Worksheet File 

.WLT eWallet File 

WaveL Wavelet Compressed Graphic 

Words of Worship Liturgy (song projection software) 

.WLV Web Link Validator File 

.WLZ WinImage File (Floppy and disk imager) 

.WM Windows Media A/V File 

.WMA Windows Media File (contains audio) 

.WMC WordPerfect Macro 

Wordmarc Text File 

Windows MathCad Startup File Backup 

.WMD Windows Media Download File (compatible with Windows Media Player 7 or later) 

.WMF Windows Metafile [IrfanView] 

.WML Wireless Markup Language File (HTML file for wireless devices) 

.WMN DART Pro 98 Playlist 

.WMP MS JScript Proxy Auto-Configuration 

Windows Media Player File 

.WMS Windows Media Skin File (compatible with Windows Media Player 7 or later) [Also see] 

.WMV Windows Media File (contains both video and audio) 

.WMX Audio Playlist 

Windows Media Player A/V Shortcut 

.WMZ Windows Media Compressed Skin File (compatible with Windows Media Player 7 or later) [Also see] 

.WN Write Now Text File 

.WNF Corel Outline Font

.WNS PrintShop Newsletter 

.WO4 STABCAL (stability calculation for aqueous systems) File 

.WO7 STABCAL (stability calculation for aqueous systems) File 

.WOA Windows Swap File 

.WOC Windows OrgChart Organization 

.WOR MapInfo Workspace 


.WOS Words of Worship Output Settings (song projection software) 

.WOT WebEx Saved Meeting Movie 

.WOV Cakewalk Home Studio Picture Cache Clip File 

.WOW Grave Composer Music Module 

.WP WordPerfect Document File 

Sharp Fontwriter Word Processing File 

.WP4 WordPerfect Document File 



.WPA ACT! Word Processor File (.WPA and .WPD used for different versions) 

.WPD WordPerfect Screen Driver or Document 

602 pro PC SUITE Document File 

ACT! Word Processor File (.WPA and .WPD used for different versions) 

.WPF WordPerfect Text File 

Enable Document 

WorldPort Fax 

.WPG WordPerfect/Drawperfect Graphics 

WildTangent Branded .PNG File 

.WPI WCPUID Plug-in (WCPUID confirms reliability of presentation data by CRC code) 

.WPJ W32Dasm Project File 

.WPK Keyboard 

WordPerfect Macros 

.WPL Words of Worship Playlist (song projection software) 

Online WebPanel File 

WHAT IF MOL-object (molucular images) 

Draxy Software Wallpaper Sequencer 

PFS WinWorks Spreadsheet 

.WPM WordPerfect Macro 

.WPS Works Text Document 

.WPT WordPerfect Template 

602 pro PC SUITE Template Document File 

.WPW PerfectWorks Document 

WordPerfect Document 

.WPX Adobe printer Information File (Usually found in C:\Windows) 

.WQ! Compressed Quattro Pro Spreadsheet 

.WQ1 Quattro Pro Spreadsheet 

.WQ2 Quattro Pro Spreadsheet 

.WR! Compressed Lotus Spreadsheet 

.WR1 Symphony Spreadsheet File 

.WRAP MediaForge Runtime Player 

.WRD Charisma Template 

.WRF WebEx Recording (MS Office add-in for meetings, etc.) 

.WRI Write Document (Use WordPad to open) 

.WRK Spreadsheet File 

Cakewalk Music Project File 

DATAIR Pension Administration System Work File (temporary file) 

.WRL Plain Text VRML File [VRML] 

.WRML Plain Text VRML File [VRML] 

.WRP Amiga Compressed Archive File 

.WRS WordPerfect Windows Printer Driver 

.WRT IBM Writing Assistant File (DOS Application) 

.WRX Progress Database File 

.WRZ GNUZIP Compressed VRML File [VRML]

.WS WordStar Document 

SmartWare Worksheet (requires login) 

Hummingbird Exceed File 

IBM iSeries Client Access File 

SigmaNEST (CAD Software) 

.WS1 WordStar for Windows 1 Document 







.WSA Animation Shop Workspace 

.WSAD WildTangent Actor Definition 

.WSBM WildTangent Material File 

.WSC Windows Script Component 

.WSD WordStar Data File 

EROSION 3D Watershed [Format (pdf)] 

.WSDL Web Services Description Language File (used by XML applications) 

.WSE Wise File 

.WSF Windows Script File [WinForce] 

.WSG Words of Worship Song (song projection software) 

.WSGO WildTangent Mesh and UVW Mapping File 

.WSH Windows Script Host Settings File 

.WSM SMS Installer Working File 

.WSMO WildTangent Motion File 

.WSP Chromeleon Wordspace 

Paint Shop Pro Workspace 

Fortran PowerStation Workspace [FORTRAN] 

Whisper 32 Password Manager 

.WSQ Wavelet-packet Scalar Quantization 

.WSR FirstStop WebSearch File 

.WSS ReliaSoft RG (Reliability Growth Analysis Software) 

.WST WordStar Text File 

.WSX WinMX Filesharing Program 

.WSZ WinAmp Skin Zip File 

.WT WildTangent Branded .X 3D Model 

.WT2 WordExpress Document Template 

.WTX ASCII Text File 

.WTXT WildTangent Branded .TXT File 

.WV WavPack Lossless Audio Compression 

.WVE Component of a DIVX Movie Conversion 

Psion Series 3a/3c/3mx Waveform Sound File [Player] 

.WVL Wavelet Compressed Bitmap 

.WVX Metafile (points to Windows Media Video [.WMV] file) 

.WWB WordPerfect Button Bar 

.WWK WordPerfect Keyboard Layout 

.WWL Word Add-in File 

.WWP Worms World Party Teams File 

.WWS AutoRoute User Information 

.WWV WildTangent Branded .WAV File 

.WXB EXP: The Scientific Word Processor 

.WXP EXP: The Scientific Word Processor Document 

.WXS Easy Cross File (cross stitch design) 

.WZB Librarian of OZ Sharp Book Viewer Add-on 

.WZD Sharp Organizer Program or Data File 

.WZG WZebra File 

.WZN WhizFolder Document

XXXXXXXXXXXXXXXXX http://pulsar.sitemynet.com 

.X LEX Program File 

Amapi 3D Modeling (prior to version 4) 

Stardent AVS X Image [XnView] 

Xview Object (create DirectX 3D scenes) 

.X01 Paradox Secondary Index (can be 01 to 09) 

.X16 Macromedia Program Extension (16-bit) 

.X32 Macromedia Program Extension (32-bit) 

.X3D Xara 3D Project File 

.X4M TeamLinks Mail File Data 

.X5 Rockwell Software Logix 5 File 

.X_T Parasolid CAD File 

.XA Extended Architecture File 

The Sims (Maxis) Extensive Audio 

File on PSX Disc 

Gear CD Suite File 

.XAB Xenis Mail Address Book 

.XAN XANIA® Browser 

xyALGEBRA File 

.XAR Xara X Ve ctor Drawing 

Corel Xara Drawing (old) 

.XBF Emperor Battle for Dune [Format] 

.XBM X Bitmap Graphic [IrfanView] 

.XBS ETAK MapBase 

.XCF GIMP Image File [GIMP] [XnView] 

.XDF Workshare Synergy File 

Milnta APL Transfer Function (Dyalog APL File) 

.XDP UNIX File (unverified) 

.XDS OpenGL Performer Script 

.XDW Fujixerox DocuWorks File [Viewer (in Japanese)] [Viewer (in English)] 

Milnta APL Transfer Function (Dyalog APL Workspace) 

.XFD XML Form in XFDL Format [Viewer] 

.XFDF Acrobat Forms Document 

.XFM OmniForm XML Format 

.XFN Ventura Printer Font 

.XFR Symantec Norton Anti-Virus Corporate Version Failed Update 

.XFT Chiwriter 24 Pin Printer Font 

.XFX Fax File (various) 

.XG1 Techno Toys XG-909 MIDI Drum Machine File 

.XG9 Techno Toys XG-909 MIDI Drum Machine File 

.XGM Techno Toys XG-909 MIDI Drum Machine File 

.XGO LogMate for Windows File 

GeoConcept File 

.XGR MS Graph Edit XML Graph 

.XI Fast Tracker 2 Instrument 

ScreamTracker Instrument File 

.XIF Wang Image File 

Often a Fax Image (TIFF) File [IrfanView] 

ScanSoft Pagis XIF Extended Image Format (FAX) 

Xerox Image File 

.XIP Hotbar Image Compression Format 

.XJS WinExplorer Java Script 

.XJT Compressed GIMP Image with Properties of GIMP (.XJT is plain tar file) 

.XJTGZ Compressed GIMP Image with Properties of GIMP (gzip compressed tar file) 

.XJTZ2 Compressed GIMP Image with Properties of GIMP (bzip2 compressed tar file) 

.XL Old Amiga Movie Format 

.XLA Excel Add-in [Buy Office XP at Shop.Microsoft]

Xlib Archive 

.XLB Excel File [Buy Office XP at Shop.Microsoft] 

.XLC Excel Chart [Buy Office XP at Shop.Microsoft] 

.XLD Excel Dialog [Buy Office XP at Shop.Microsoft] 

.XLG Xnetech Engraving Logo File 

.XLK Excel Backup [Buy Office XP at Shop.Microsoft] 

.XLL Excel Add-in (Dynamic Link Library) [Buy Office XP at Shop.Microsoft] 

.XLM Excel Macro [Buy Office XP at Shop.Microsoft] 

.XLR MS Works File 

.XLS Excel Worksheet [Buy Office XP at Shop.Microsoft] 

(also MS Works spreadsheet) 

DATAIR Data Import Specification Translation File 

.XLSHTML Excel HTML Document [Buy Office XP at Shop.Microsoft] 

.XLSMHTML Excel Archived HTML Document [Buy Office XP at Shop.Microsoft] 

.XLT Excel Template [Buy Office XP at Shop.Microsoft] 

Procomm Plus Translation Table 

Lotus Translation Table 

.XLTHTML Excel HTML Template [Buy Office XP at Shop.Microsoft] 

.XLV Excel VBA [Buy Office XP at Shop.Microsoft] 

.XLW Excel Workspace [Buy Office XP at Shop.Microsoft] 

.XLX XoloX Incomplete Download File 

.XM Sound File 

Fast Tracker 2 Extended Module 

.XMAP File That Controls How XML/XSL Gets Served (SITEMAP.XMAP Info) [ASCII Text File] 

.XMB X-Wing Mission Briefing File 

.XMF Milnta APL Transfer Function (Mainframe (SAM) File) 

.XMFG MediaForge Runtime Player 

.XMI Winamp Extended Midi File 

EverQuest File 

.XML Extensible Markup Language File [XML] 

.XMP Graphic File 

.XMS ViewCafé XML Markup Session 

.XMT_TXT Parasolid CAD File 

.XMV Milnta APL Transfer Function (Mainframe (SAM) Workspace) 

.XMX Character Set File 

AutoCAD External Message Compiled File 

.XNF Standard Network File Form 

.XNG OM2 911 Xchange Version 6 Document 

.XNK Exchange Shortcut 

.XOT Xnetech Job Output File 

.XP WinXP Theme (unverified) 

.XPI Mozilla Browser Archive (open with any ZIP utility) 

.XPL Music File 

WinExplorer Simple Script 

.XPM X Picsmap Graphic [IrfanView] 

.XPO Omega Research ProSuite 

.XPTHEME Winstyles Theme (customizes the Windows Desktop) 

.XPW Screen-Fillable Surfer Version of a Form 

Leading Market Technologies EXPO (professional investment charting/analysis) 

.XPY MarketBrowser (investment charting/analysis) 

.XQT SuperCalc Macro Sheet 

Waffle Executable File 

.XRF Cross Reference 

.XR1 Epic MegaGames Xargon File 

.XRF Crossreference File 

.XS Hummingbird Exceed File 

.XS8 SIMUL8 (Business Simulation XML file) 

.XSD XML Schema File [XML] (read in text editor) 

.XSF Milnta APL Transfer Function (APL+Win File (former STSC)) 

.XSI Softimage XSI

.XSL XML Stylesheet (eXtensible Style sheet Language for Transformations (XSLT)) [XML] (read in text 

editor) 

FileMaker Database Design Report Template 

.XSM LEXIS-NEXIS Tracker 

.XSN xyALGEBRA File 

.XSW Milnta APL Transfer Function (APL+Win Workspace (former STSC)) 

.XT* Crosstalk Related File 

.XTB LocoScript External Translation Table 

.XTG Quark Xpress Tags File 

.XTR RealArcade Compressed Data File 

.XTS CSPro File (combined IMPS and ISSA Census Processing System) 

Babya Desktop Shell System Software Extension 

.XUF Milnta APL Transfer Function (Unix (SAX) File) 

.XUL XML User Interface Language 

.XUW Milnta APL Transfer Function (Unix (SAX) Workspace) 

.XV Khoros Visualization Image File [XnView] 

.XVB WinExplorer VB Script 

.XVP Xview Package File (create DirectX 3D scenes) 

.XVS Xview Scene Package File (create DirectX 3D scenes) 

.XVU BOClean Database File 

.XWD X Windows Dump 

Crossdown Puzzle File 

.XWF Yamaha XG Works File 

.XWI X-Wing Mission File 

.XWK Crosstalk Keyboard Mapping 

.XWP Crosstalk Session 

XMLwriter XML Editor File 

Xerox Writer Text File 

.XX Xxencoded File 

Arcedit Temporary File 

.XXE Xxencoded File 

.XXL Archived File [Archive for Win] [FILEH for LINUX] 

.XXX Singer Sewing Machine Professional SewWare File 


Controlware VJ400 Digital CCTV Recording 

.XXY SPARC Executable Script File (e.g., /etc/hostname.xxy identifies network interface on local host) 

.XY XYWrite Text File 

.XY3 XYWrite Text File 

.XY4 XYWrite IV Document 

.XYP XYWrite III Plus Document 

.XYW XYWrite Windows 4.0 Document 

.XYZ XMol XYZ (MIME type chemical/x-xyz) 

YYYYYYYYYYYYYYYYYYYYYYYYYYYy 

.Y Amiga Yabba Compressed Archive File 

Yaac Grammar File 

Desktop Color Separation Specification Yellow Layer (usually an EPS file) 

.Y01 Paradox Secondary Index (can be 01 to 09) 

.Y64 Commandos 2 Game Mission 

.YAB YaBasic Source 

.YAL Arts & Letters Clipart 

.YBK Encarta Yearbook 

.YDK Yusuf Data Recovery (unverified) 

.YENC yEnc Encoded File (usually on usenet)

.YLT TheWord & Bible Companion Young's Literal Translation Bible 

.YMAP Ygnius Computer Aided Thinking File 

.YMG Yahoo! Messenger File 

.YNC yEnc Encoded File (usually on usenet) 

.YPS Yahoo! Messenger File 

.YSP Bitmap Graphic (unconfirmed) 

.YUV Color Space Pixel Format 

.YZ Yac Compressed Archive File 

ZZZZZZZZZZZZZZZ http://pulsar.sitemynet.com 

.Z Compressed Archive File 

.Z?? WinZip Split Compressed Archive (?? is a number from 01 upward) 

.Z# Frotz Z-Code Game 

.Z0 ZoneAlarm File 

.Z1 ZoneAlarm File 

.Z3 Infocom Game Module 

.Z64 Nintendo 64 Emulator 

.Z80 ZX Spectrum Emulator 

Z80 Snapshot [Format] 

.ZA? (? = A, B, C,...) Output of the UNIX SPLIT Utility (portions of a file) 

.ZAP FileWrangler Compressed File (only used in beta) 

MS Windows Software Installation Settings 

.ZARGO Poseidon UML CE/SE Diagram 

.ZAX Z-Axis 3-D Office Design Software 

.ZBA Compressed File Run Through UNIX COMPRESS and BTOA Utilities 

.ZBD MechWarrior 3 Snow Fields File 

Canon ZoomBrowser Database File 

Zebedee Encrypted File 

.ZBF Z-Buffer Radiance File 

.ZC Zipkey Configuration File 

.ZCH ZIG File (ZIG Game Construction Kit) 

.ZDB Wonder Word Data File 

.ZDF Z-Firm Document Folder 

.ZDG ZView Compressed Document 

.ZDP ZDNet Password Pro 32 (My Passwords.zdp) 

.ZEI ANNO 1602 Game 

.ZER Zerberus File 

.ZFS C++ Assembly Source 

Z-Firm File Stub 

Interstate '76 Archive [Dragon UnPACKer] 

Interstate '82 Archive [Dragon UnPACKer] 

.ZFSENDTOTARGET Compressed Folder SendTo Target File 

.ZGM ZenoGraphics File 

.ZHP Zipped SwiftView File 

.ZID Z-Firm ID 

.ZIG ZIG Game File (ZIG Game Construction Kit) 

.ZIM PagePath Technologies Compressed Mac File 

.ZIP Compressed Archive File 

.ZL? ZoneAlarm Mailsafe Renamed File 

ZoneAlarm Mailsafe will quarantine mail attachments and changes 

their extension. The conversions are: 

.ADE to .ZL0, .ADP to .ZL1, .BAS to .ZL2, .BAT to .ZL3, .CHM to .ZL4, 

.CMD to .ZL5, .COM to .ZL6, .CPL to .ZL7, .CRT to .ZL8, .EXE to .ZL9, 

.HLP to .ZLA, .HTA to .ZLB, .INF to .ZLC, .INS to .ZLD, .ISP to .ZLE, 

.JS to .Z0, .JSE to .ZLF, .LNK to .ZLG, .MDB to .ZLH, .MDE to .ZLI, 

.MSC to .ZLJ, .MSI to .ZLK, .MSP to .ZLL, .MST to .ZLM, .PCD to .ZLN, 

.PIF to .ZLO, .REG to .ZLP, .SCR to .ZLQ, .SCT to .ZLR, .SHS to .ZLS,

.URL to .ZLT, .ASP to .ZLT, .VB to .Z1, .VBE to .ZLU, .VBS to .ZLV, 

.WSC to .ZLW, .WSF to .ZLX, .WSH to .ZLY, .ASX to .ZLZ 

[Documentation] 

.ZLX Atlantis Ocean Mind Word Processing File 

.ZM? ZSNES Movie (? = number of the movie) 

.ZMF Zoner Draw File 

.ZMI Chrono Chaos Creations milCgi (bulk mailer) 

.ZMK Z-Up Maker Project File 

.ZMV ZSNES Movie File 

.ZOM Amiga Compressed Archive File 

.ZOO Compressed Archive File 

Zoo Tycoon Game File 

.ZOT Zoot Database File 

.ZPK Z-Firm Package 

.ZPL ZIG File (ZIG Game Construction Kit) 

.ZRS MS Hearts Game File 

.ZS1 ZSNES Slot 1 Savestate (Super Nintendo emulator) 



.ZSK Embroidery Machine Stitch File (VeePro) [possibly read with Melco Sizer Software] 

.ZSR Form*Z Temporary Save File ($$$FMZ$$$.ZSR) 

.ZST ZSNES Slot 0 Savestate (Super Nintendo emulator) 

.ZTD Zoo Tycoon Game Add-in 

.ZTE E-Tabs Reader File 

.ZTM ZTreeWin Macro 

.ZVD ZyXEL Voice File 

.ZW Chinese 

.ZX KGB Shapshot [Format] 

.ZX82 Speculator '97 Shapshot [Format] 

.ZXS ZX32 Shapshot (unrelated to ZXS tape format) [Format] 

.ZZT ZZT Game Creation System [File Format] 

RAKAMLAR http://pulsar.sitemynet.com 

.? Multi-part Super Nintendo Game-console ROM Image (? = 1, 2, 3, etc.) [See ZNES or SNES9x] 

.0 Inno Setup Binary File 

.000 (000-999) Sequentially Numbered Backup Files 

(000-600) Paperport Scanned Image 

(.000 is desktop, .100-.600 images - number may include hex "a" to "f") 

(000-999) ARJ Multi-volume Compressed Archive (also see .A00) 

MS Doublespace Compressed Data File 

Geoworks Data File 

.00B PenSoft Payroll Backup File 

.001 (001-999) HJSplit File (file splitter for large files) 

Fax Data File (various) [XnView] 

Tagged Image Format File [IrfanView] [SwiftView] 

.01B PenSoft Payroll Backup File 

.075 Ventura Publisher 75dpi Screen Characters 




.0B PageMaker Printer Font LineDraw Characters

.1 Inno Setup Binary File 

Roff/nroff/troff/groff Manual Source (UNIX) 

.10X Gemini Bitmap Printer Graphics File 

.113 Iomega Backup File 

.123 Lotus File 

.12M Lotus Smartmaster File 

.12U PageMaker Font File 

.15U PageMaker Printer Font 

.196 Computer Snooper Log File 

.1PE TurboTax Form File 

.1ST Information (e.g., README.1ST) 

.1TX 1toX File (Logipole) 

.22 Clipstream 20 Kb Stream 

.24B 24-bit Graphic File 

.261 H.261 Encoded Video File (usually .P64) [Player] 

.263 H.263 Encoded Video File [Player] 

.286 Windows Standard Mode Driver 

.2BP Pocket PC Bitmap [XnView] 

.2D 2D VersaCAD Drawing File 

Amapi [XnView] 

.2GR Windows EGA/VGA Screen Grabber [EGA] [VGA] 

.3 Solaris Device Configuration Assistant Boot Diskette 

.301 Brooktrout Fax-Mail File [XnView] 

.303 Seq-303 Settings 

.320 Chromelion Demo Data File 

.323 H.323 Internet Telephony 

.340 Chromelion Demo Data File 

.386 Windows Enhanced Mode Driver or Swap File 

.3A3 STABCAL (stability calculation for aqueous systems) File 


.3B3 STABCAL (stability calculation for aqueous systems) File 


.3C3 STABCAL (stability calculation for aqueous systems) File 


.3D VersaCAD 3D Drawing File 

.3DB 3D Mark Database (system testing - unverified) 

.3DM 3D Modeler File 

.3DMF QuickDraw 3D Metafile 

.3DML Rover 3D Modeling 

.3DP Serif 3D Plus 

.3DS 3D Studio Graphic 

.3DV Visual Component File 

.3DZ Easy 3D Creator Project File 

.3FX Corel Chart 3D Effect 

.3GR Windows SVGA/XVGA Screen Grabber [SVGA] 

.3IN MSN Setup Information 

.3O3 STABCAL (stability calculation for aqueous systems) File 


.3PI 3rd PlanIt File (CAD program for model railroads) 

.3T4 Binary to ASCII Conversion 

.3TA Triple-T Animation 

.3TP Triple-T Plug-in 

.3XE 3DLinX Entity (3D drawing tool)

.411 Sony Mavica Data File [XnView] 

.44 Clipstream 32 Kb Stream 





.4BIT GoDot [XnView] 

.4BT GoDot [XnView] 

.4C$ 4Cast/2 Data 



.4DB 4D Database Structure File (data fork - .RSR for resource fork) 

.4DD 4D Database Data File (data fork - .4DR for resource fork) 

.4DF 4D Database Windows Search Document 

.4DL 4D Database Windows Log File 

.4DR 4D Database Data File (resource fork - .4DD for data fork) 

.4DS 4D Database Windows Data Segment 

.4DX 4D Database Plug-in (data fork - .RSR for resource fork) 

.4FI 4D Database Windows ASCII Map 

.4FR 4D Database Windows Apply Formula Document 

.4GE Informix 4GL Compiled Code 

.4GL Informix 4GL Source 

.4H3 STABCAL (stability calculation for aqueous systems) File 

.4LB 4D Database Windows Label 

.4LK 4D Database Windows Hot Link File 



.4PP PhotoParade Player (digital slideshow) 

.4QR 4D Database Windows Quick Report 

.4ST 4D Database Windows Saved Set 

.4SW 4DOS Swap File 

.4TH FORTH Program 

.4UG 4D Database Windows User/Groups Set 

.4V Quartet Music File 

.4VR 4D Database Windows Saved Variable 

.521 Murray State University Trojan Ring Configuration File 

.60D Vista Columbus Digital CCTV System Recording (also see .60H) [Reader] 

.60H Vista Columbus Digital CCTV System Recording (also see .60D) 

.602 T602 Text File 

.608W Audiogalaxy Music File (unverified) 

.669 669 Tracker Module 

Unis Composer Music File 

.6AM Haltech ECU Fuel and Ignition Map 

.6CM Triton FastTracker 6-Channel Music 

.710 Korg Triton Music Workstation 

.73? TI-Graph Link File 

.73I TI Bitmap [XnView] 

.7Z 7-Zip Compressed File 

.8 A86 Assembler Program File 

.82B TI-82 Graph Link Backup 

.82G TI-82 Graph Link Group 

.82I TI Bitmap [XnView]

.82P TI-82 Graph Link Program 


.83P TI-Graph Link (TI-83 Program) 



.86P TI-86 Calculator File (mainly a game file) 

.8BA Adobe PhotoDeluxe Plugin (also ends in E, F, I, X, & Y) 

.8BF Filter Factory File [Added] [IrfanView] 

.8CM Triton FastTracker 8-Channel Music 

.8LI Adobe Photoshop Plug-in (Often works with other graphics programs) 

.8M PageMaker Math 8 Printer Font 

.8SVX Sound File [Linux Player] 

.8U PageMaker Roman 8 Printer Font 

.8XU TI-83 Program 




.906 Calcomp Plotter File 

.917 Trend Antivirus File 

.92G TI-92 Graph Link Group 


.92P TI-92 Graph Link Program 

.92T TI-92 Graph Link Text 

.999 Multipass Security File 

.9XK TI-92 Circuit Analysis File 

SEMBOLLER http://pulsar.sitemynet.com 

.### Temporary File 

.#24 Locoscript 24-pin Printer Data File 

.#IB Locoscript Dot Matrix Data File 

.#SC Locoscript Dot Matrix Data File 

.#ST Locoscript Dot Matrix Printer Definition File 

.$$$ Temporary File (various) 

.$00 DOS Pipe File (could also be .$01) 

.$$A OS/2 

.$$F OS/2 Database 

.$$P OS/2 Notes 

.$$S OS/2 Spreadsheet 

.$D$ OS/2 Planner Data File 

.$DB dBase Temp File 

.$ED MS C/C++ Temporary Editor File 

.$LN Borland C++ TLink Response File 

.$VM MS Windows Virtual Manager Temp File 

.$#! Cryptext 

.(D) pcAnywhere Temporary File 

.@@@ Screen Files (shown during various installations)

.@HA ImsiSoft E-mail Animator 

._DD Norton Disk Doctor Recovered File 

._DM Nuts n Bolts Disk Minder Recovered File (Helix Software now part of McAfee) 

._MP InstallShield Temporary Installer File 

.?q? Squeeze 

.??? ANY three character audio file: May be a dictation file where the 

extension is the dictator's initials; playable by BCB Voice Systems 

software. This could likewise be a dictation file in TrueSpeech format. 

Use Windows Sound Recorder and/or Media Player to pay these back. 

.~ Temporary File 

.~AP Borland C++ AppExpert Project Database File 

.~DE Borland C++ Project Backup File 

.~DF Borland Delphi Backup File 

.~DP Borland Delphi Backup File 

.~DR ARKEY Drawing Backup File 

.~MN Norton Menu Backup 

.~NT NT Install Files (Used between first & second reboot) 

.~PA Borland Delphi Backup File 

.~PR Terramodel Project Backup 

.~SG TapCIS Message Index File 

.~$~ 1st Reader Temporary File 

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