07.01.2013 Views

The Online World resources handbook

The Online World resources handbook

The Online World resources handbook

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Frequently used terms http://home.eunet.no/~presno/bok/v4.html<br />

BBS<br />

Bulletin Board or Bulletin Board System. See Bulletin Board.<br />

Big5<br />

&RGLQJ VFKHPH GHYHORSHG LQ 7DLZDQ IRU XVLQJ &KLQHVH RQ FRPSXWHUV 7KHUH DUH<br />

varieties of Big5 codes, the most common being ET Big5 (the code used by the<br />

Taiwanese program ETen, pronounced Yi3tian1) and HKU Big5 (the code used for<br />

programs developed at Hong Kong University).<br />

ET Big5 files must be read with the ETen operating system. Check out the Archie<br />

server at telnet://archie.TWNIC.NET (login: archie) to locate software and get more<br />

information. Also, check Mojikyo.<br />

Binary<br />

<strong>The</strong> base 2 number system in which only the digits 1 and 0 are used is called the binary<br />

system. <strong>The</strong> binary system lets us express any number, if we have enough bits, as a<br />

combination of 1's and 0's. Also used to express conditions like on/off, true/false, yes/no.<br />

Binhex<br />

Macintosh software and documents (other than text files) are often "encoded" into text<br />

files for transmission over the network. A common standard for such encoding is<br />

referred to as BinHex. You can usually tell that a file contains a BinHex encoded Mac<br />

ILOH DV WKH ILOH QDPH HQGV LQ KT[<br />

BinHex5.0 format is a MacBinary format, while BinHex 4.0 files are Macintosh<br />

ASCII format.<br />

To keep transmission times short, the BinHexed files are often "compressed" using<br />

a utility like StuffIt. To reconstitute the Mac application or document you may need to<br />

"un StuffIt." <strong>The</strong> freeware program, StuffIt Expander, will BinHex and unstuff most<br />

Mac files. Uncompression programs are available from archives on the Internet.<br />

Examples: xbin23.zip (DOS), mcvert (Unix), and binhex (VM/CMS).<br />

Bits<br />

Bit is an abbreviation for Binary digIT. Computer words and data are made up of bits,<br />

the smallest unit of information.<br />

A bit can be either zero or one, represented in a circuit by an off or on state,<br />

respectively. <strong>The</strong> bits are set on or off to store data, or to form a code that in turn sends<br />

instructions to the computer's central processing unit.<br />

Bits per second (bps)<br />

Bits per second (bps) is the number of binary digits sent in one second. It refers to the<br />

rate at which the bits within a single frame are sent ('frame' is another term for 'packet').<br />

<strong>The</strong> gaps between frames can be of variable length. Accordingly, bps does not refer to<br />

the rate at which information is actually being transferred.<br />

We usually estimate the number of characters transferred per second (cps) by<br />

dividing the number of bps by 10. Example: 2400 bps transfers around 240 characters<br />

per second.<br />

Boolean<br />

A Boolean search is a search that allows logical relations between parts. This means that<br />

you power your request with the ability to find all relevant documents that fulfill one<br />

condition AND (OR) another one. Other common operators include NOT and NEAR.<br />

<strong>The</strong> search algorithm is built on the algebraic theories of the English mathematician<br />

3 of 17 23.11.2009 15:50

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!