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IOS
IOS 1 Instructor operating [or operated] station [or
system].
2 Internal operating system.
3 Innovation and opportunity selection.
4 Integrated operational support [contract] (UK).
IOSA 1 Integrated optical spectrum analyser.
2 Integrated overhead Sigint architecture.
3 IATA, or international, operating, or operational,
safety audit (IATA).
IOT 1 In-orbit test.
2 Initial officer training (RAF)
IOTE, IOT&E Initial operational test and evaluation.
IOV In-orbit validation (ESA).
IOVC In overcast.
IP 1 Initial point.
2 Intermediate-pressure.
3 Instructor (rarely, instrument) pilot.
4 Identification pulse (SSR).
5 Identification position (IFF).
6 Intellectual property (company law), R adds right[s].
7 Initial provisioning of spares.
8 Industrial participation.
9 Internet protocol.
10 Instrumented prototype [A adds aircraft].
11 Ice pellets.
12 Intercept point (radio dBm).
13 Initial production.
14 Instrument [flight] procedure[s].
I/P Identification position (US).
IPA 1 Independent Pilots’ Association [office,
Haywards Heath] (UK).
2 Instrumented production aircraft.
IPACG International Pacific ATC Co-ordinating
Group.
IPAD 1 Integrated programs for aerospace [vehicle]
design.
2 Improved processing and display [S adds system].
IPARS, Ipars International programmed airlines reservation
system.
IPAS Integrated pressure air system.
IPAT 1 Inertial pointing-aided tracking.
2 Integrated propulsion analysis tool.
IPATS International Police Aviation Training School.
IPB 1 Illustrated parts breakdown.
2 Intelligence preparation of the battlespace, one of the
pillars of PBA.
IPBS In-flight propeller balancing system.
IPC 1 Intermittent positive control (ATC backup, IPS
used in US).
2 IP compressor.
3 Illustrated parts catalogue.
4 Integrated processing cabinet.
5 Instrument proficiency check.
IPC-ASA IPC (1) automatic separation assurance;
advises conflicts to DABS/Adsel aircraft.
IPCC International Panel on Climate Change.
IPCS 1 Institution of Professional Civil Servants (UK).
2 Intelligent power-control system.
3 Ice-protection control system.
IPD 1 Institudo de Pesquisas e Desenvolvimento
(Brazil).
2 Improved point defence [MS adds missile system].
3 Initial production delivery.
IPSA
4 Integrated product design [by prime plus suppliers],
or delivery.
5 Imagery processing and dissemination; S adds
system.
6 Information processing division.
7 Initial professional development.
IPE 1 Institution of Production Engineers (UK).
2 Increased- (or improved-) performance engine.
3 Interconnect, passive and electro-mechanical.
IPEC 1 Inflight passenger entertainment and communications;
C adds conference, S systems.
2 Integrated planning and execution center.
IPES Individual passenger entertainment system.
Ipex Immediate-purchase excursion; low-price fare
without advance booking and without guarantee of seat.
IPF Integrated, or integration and processing facility.
I/PF Identification position feature.
IPFA Inspection des Programmes et Fabrications de
l’Armement (F).
IPFD Integrated primary flight display.
IPG Indian Pilots’ Guide.
IPI 1 Intercept pattern for identification.
2 Inertial position insertion.
3 Initial protocol identifier.
IPID 1 IR perimeter intrusion detection.
2 Indefinite quantity, indefinite delivery.
IPK International Prototype Kilogramme, a platinum
body kept at Sèvres.
IPL 1 Illustrated parts list.
2 Image Product Library (NIMA).
IPM 1 Interplanetary medium.
2 Immediate past Master (GAPAN).
IPMS 1 International Plastic (singular) Modelers (US
spelling) Society.
2 Integrated platform management system.
3 Institution of Professionals, Managers and Specialists
(UK).
IPN Iso-propyl nitrate.
IPNVG Integrated panoramic NVGs.
IPO 1 Initial public offering.
2 Integrated product ownership.
IPP 1 Institut für Plasma-Physik (G).
2 Information-processing panel.
3 Industrial preparedness planning (US).
4 Impact-point prediction.
IPPS Integrated power plant system.
IPR 1 Intellectual property rights, has particular
relevance to software.
2 Inches per revolution.
3 Internet protocol router.
IPRA 1 Independent precision radar approach.
2 Industrial participation risk assessment.
I/P, I/Press Intermediate pressure.
IPS 1 Information presentation or processing system.
2 Instrument-pointing system.
3 Inlet particle separator.
4 Intelligence and planning squadron (RAF).
5 Intermediate pitch stop (helicopter).
6 Interactive pilot station.
7 Intermittent positive control (ATC).
8 Integrated power system.
i.p.s. Instructions per second.
IPSA Infirmières-Pilotes Parachutists Secouristes de
l’Air (F).
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