Lexikon's History of Computing

File Extensions and Symbols Reference

Graphics Related File Extensions

PC File Extensions

Technical Symbols and Measures

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GRAPHICS RELATED ABBREVIATIONS


The following are three-letter file extensions associated graphics files and other files.

.BIN binary file

.BMP bit mapped file format

.CDR Corel Draw graphics file

.CGM computer graphics metafile

.EPS Encapsulated PostScript File

.EXE executable file

.FNT font

.FON graphics font file (IBM)

.GEM a GEM draw file

.GIF Graphics Interchange Format

.GRF Micrografx

.HPG Hewlett-Packard Graphics file

.IDX index file used in FoxBASE

.JPG JPEG (Joint Photographic Experts Group) compression format

.PCX a graphics file format (ZSoft)

.TIF Tagged Image Format

.WPG a WordPerfect Graphics file

.ZIP a compressed file using PKWare utilities

 


PC FILE EXTENSIONS


AFM Adobe Type 1 font

.ARC archived file

.ASC sometimes denotes a DOS ASCII file

.ASM program file in assembly language code

.COM DOS command file

.BAK a backup file

.BAS basic program

.BAT DOS batch file

.BIN binary file

.BMP bit mapped file format

.CDR Corel Draw graphics file

.CFG a DOS configuration file

.CGM computer graphics metafile

.COB COBOL program

.COM a command file, program file

.DAT data file

.DBF dBase database file

.DCA Document Content Architecture

.DIF Document Interchange Format

.DOC document file (word processing or text)

.DRV driver specifications for hardware

.EPS Encapsulated PostScript File

.EXE executable file

.FNT font

.FON Windows bit-mapped screen font and vector font

.FOR FORTRAN program file

.FOT TrueType Font

.GEM a GEM draw file

.GIF Graphics Interchange Format

.GRF Micrografx

.HLP a help file

.HPG Hewlett-Packard Graphics file

.IDX index file used in FoxBASE

.INI a Windows initialization program file

.LBL dBase label file

.LIB library file

.LOG log file or storage file for data

.MAC macro command file

.MDF an Automenu Definition File

.MNU menu file

.NDX dBase index file

.NTX Clipper database file

.PAS PASCAL program file

.PCX a graphics file

.PIF Program Information File

.PRG program file

.PRT file for printing

.RFT Revisable Form Text

.SAV save format, a backup copy

.SYS a system file

.TIF Tagged Image Format

.TMP a temporary file

.TT True Type Font

.TTF TrueType Font

.TXT usually denotes a DOS Text (ASCII file)

.WK1 Lotus 1-2-3, version 2 spreadsheet

.WKS Lotus 1-2-3, version 1a spreadsheet

.WPG a WordPerfect Graphics file

.WPM a WordPerfect Macro file

.XLC an Excel chart file

.XLS an Excel spreadsheet file

.ZIP a compressed file using PKWare utilities

 


TECHNICAL SYMBOLS AND MEASURES


Abbreviation/symbol Prefix Meaning

da deka ten

h hecto hundred

k kilo thousand

M mega million

G giga billion

T tera trillion

p peta quadrillion

e exa quintillion

a atto quintillionth

f femto quadrillionth

p pico trillionth

n nano billionth

u micro millionth

m milli thousandth

c centi hundreth

d deci tenth

COMPUTER INFORMATION STORAGE

Kb Kilobit

Kbytes Kilobytes

Mb Megabit

Gb Gigabit

Tb Terabit

KB Kilobyte

MB Megabyte

GB Gigabyte

TB Terabyte

K 1024 Bytes

M 1,048,576 Bytes

PRINTER RESOLUTION

dpi Dots per inch

SOUND INTENSITY

dB Decibel

CARD READER SPEED

cps Cards per second

cpm Cards per minute

INFORMATION TRANMISSION SPEED

bps Bits per second

Baud Bits per second (usually)

Kilobaud Thousand bits per second

ELECTRICITY

Hz Hertz

KHz Kilohertz

MHz Megahertz

GHz Gigahertz

cps cycle per second

Kc Kilocycle (1,000 cycles per second)

Mc Megacycle (1,000,000 cycles per second)

uW Microwatt (millionth of a watt)

mW Milliwatt (thousandth of a watt)

W Watt

KW Kilowatt (thousand watts)

MW Megawatt (million watts)

uV Microvolt (millionth of a volt)

mV Millivolt (thousandth of a volt)

V Volt

KV Kilovolts (thousand volts)

MV Megavolts (million volts

KEV Thousand electron volts

MEV Million electron volts

BEV Billion electron volts

uA Microamp (millionth of an amp)

mA Milliamp (thousandth of an amp)

A Amp (ampere)

KA Kiloamps (thousand amps)

MA Megaamps (million amps)

TIME

ps Pico second (trillionth of a second)

ns Nano second (billionth of a second)

us Microsecond (millionth of a second)

ms Millisecond (thousandth of a second)

PROCESSING SPEED

MIPS Million instructions per second

MFLOPS Million Floating Point Operations Per Second

GigaFLOPS Billion Floating Point Operations Per Second

PRINTING SPEED

cps Characters per second

wpm Words per minute

lpm Lines per minute

ppm Pages per minute

SCREEN RESOLUTION

ppi Pixels per inch

Mp Megapixel (million pixels)


 

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