computer file extension list

    * a - library (unix)
    * .ad - screen saver data (AfterDark)
    * .adi - graphics (AutoCAD)
    * .adl - MCA adapter description library (QEMM)
    * .afi - Truevision bitmap graphics
    * .afm - Type 1 font metric ASCII data for font installer (ATM - many)
    * .all - format file for working pages (Always)
    * .all - general printer information (WordPerfect for Win)
    * .ani - animation (Presidio - many)
    * .anm - animation (Deluxe Paint Animator)
    * .ans - ANSI graphics (character animation)
    * .ans - ASCII text ANSI character set (NewWave Write)
    * .asc - ASCII text file
    * .avi - Audio Video Interleaved animation file (Video for Windows)

B

    * .bak - backup file
    * .bas - BASIC source code file
    * .bat - batch file (DOS)
    * .bbm - brush (Deluxe Paint)
    * .bbs - Bulletin Board System announce or text info file
    * .bch - batch process object file (dBASE Application Generator)
    * .bcp - Borland C++ makefile
    * .bdf - Bitmap Distribution Format font file (X11)
    * .bga - bitmap graphics
    * .bib - bibliography (ASCII)
    * .bib - database - not compatible with TeX format (Papyrus)
    * .bib - literature database (TeX/BibTeX)
    * .bif - Binary Image Format b&w graphics (Image Capture board)
    * .bin - binary file
    * .bio - OS2 BIOS
    * .bit - bitmap X11
    * .bm - BitMap graphics
    * .bmk - Help Bookmarks (Windows 3.x)
    * .bmp - BitMaP graphics (PC Paintbrush - many)
    * .bpt - bitmap fills file (CorelDRAW)
    * .btm - Batch To Memory batch file (4DOS)
    * .bup - backup file

C

    * .c - C source code file
    * .c - compressed unix file archive created by COMPACT
    * .c++ - C++ source code file
    * .cal - calendar file (Windows 3.x)
    * .cal - spreatsheet (SuperCalc)
    * .cbl - COBOL source code file
    * .cbm - compiled bitmap graphics (XLib)
    * .cbt - Computer Based Training (many)
    * .cc - C++ source code file
    * .ceg - bitmap graphics (Tempra Show - Edsun Continuous Edge Graphics)
    * .cga - CGA display font (Ventura Publisher)
    * .chk - recovered data (DOS CHKDSK)
    * .chk - temporary file (WordPerfect for Win)
    * .clp - clip art graphics (Quattro Pro)
    * .clp - clipboard file (Windows 3.x)
    * .cls - C++ class definition file
    * .cmd - batch file (OS/2)
    * .cmd - command (dBASE - Waffle)
    * .cmd - external command menu (1st Reader)
    * .cpp - C++ source code file
    * .cpp - presentation (CA-Cricket Presents)
    * .cpt - compressed Mac file archive created by COMPACT PRO (ext-pc.zip)
    * .cur - cursor image file (Windows 3.x)

D

    * .dat - data file in special format or ASCII
    * .dbd - debug info (Clarion Modula-2)
    * .dbg - symbolic debugging information (MS C/C++)
    * .dcf - disk image file
    * .dd - compressed Macintosh file archive created by DISKDOUBLER
    * .deb - DEBUG script (DOS Debug)
    * .def - defaults - definitions
    * .dem - demonstration
    * .dem - graphics (VistaPro)
    * .dgs - diagnostics
    * .dic - dictionary
    * .dir - directory file (VAX)
    * .diz - description file (Description In Zip)
    * .dlg - dialog resource script file (MS Windows SDK)
    * .dll - Dynamic Link Library (Windows 3.x - OS/2)
    * .dll - export/import filter (CorelDRAW)
    * .dmp - dump file (eg. screen or memory)
    * .doc - document text file
    * .dos - network driver (eg. pkt_dis.dos)
    * .dos - text file containing DOS specific info
    * .drv - device driver eg. for printer
    * .dsk - project desktop file (Borland C++ - Turbo Pascal)
    * .dss - screensaver file (DCC)

E

    * .ega - EGA display font (Ventura Publisher)
    * .emu - terminal emulation data (BITCOM)
    * .env - Enveloper macro (WOPR)
    * .env - environment file (WordPerfect for Win)
    * .err - error log
    * .err - error messages for command line compilers
    * .esh - Extended Shell batch file
    * .exc - REXX source code file (VM/CMS)
    * .exc - exclude file for Optimize (do not process) (QEMM)
    * .exe - directly executable program (DOS)
    * .exm - MSDOS executable, system-manager compliant (HP calculator)
    * .ext - extension file (Norton Commander)

F

    * .fac - FACE graphics
    * .faq - Frequently Asked Questions text file
    * .fax - fax (raster graphics) (most Fax programs)
    * .fdw - form (F3 Design and Mapping)
    * .fix - patch file
    * .frm - form (Visual Basic)
    * .ftp - configuration (FTP Software PC/TCP)
    * .fx - on-line guide (FastLynx)
    * .fxd - phonebook (FAXit)

G

    * .gbl - global definitions (VAXTPU editor)
    * .gfb - compressed GIF image created by GIFBLAST (gifblast.exe)
    * .gft - font (NeoPaint)
    * .gif - Graphics Interchange Format bitmap graphics (CompuShow)
    * .gly - glossary (MS Word)
    * .gph - graph (Lotus 1-2-3/G)
    * .gr2 - screen driver (Windows 3.x)
    * .grb - MS-DOS Shell Monitor file (MS-DOS 5)
    * .grp - group file (Windows 3.x - Papyrus)

H

    * .hlp - help information
    * .hof - Hall Of Fame (game scores)
    * .hp8 - ASCII text HP Roman8 character set (NewWave Write)
    * .htm - HTML document (Mosaic)
    * .htx - Hypertext file

I

    * .iax - bitmap graphics (IBM Image Access eXecutive)
    * .ibm - compressed file archive created by ARCHDOS (Internal IBM only)
    * .icn - ICON source code file
    * .ico - icon (Windows 3.x)
    * .id - disk identification file
    * .ifs - system file (OS/2) hpfs.ifs
    * .img - bitmap graphics (Ventura Publisher - GEM Paint)
    * .inc - include file (several programming languages)
    * .inf - information text file (ASCII)
    * .inf - install script
    * .ini - initialization file
    * .ins - (WordPerfect) wp51.ins
    * .ins - installation script (1st Reader)

J

    * .jas - graphics
    * .jbd - datafile (SigmaScan)
    * .jpc - graphics (Japan PIC)
    * .jpg - JPEG Joint Photography Experts Group format bitmap graphics
    * .jtf - graphics (TIFF file with JPEG compression)

K

    * .key - security file eg. Shareware Registration info
    * .kps - IBM KIPS bitmap graphics
    * .kyb - keyboard mapping (FTP Software PC/TCP)

L

    * .lbm - bitmap graphics (DeluxePaint)
    * .lbm - linear bitmap graphics (XLib)
    * .lcl - (FTP Software PC/TCP)
    * .ldb - (MS Access)
    * .lgo - startup logo code (Windows 3.x)
    * .lib - library file (several programming languages)
    * .lis - listing (VAX)
    * .log - log file
    * .lpc - printer driver (TEKO)

M

    * .m3d - 3D animation macro
    * .mac - bitmap graphics (Macintosh MacPaint)
    * .mac - macro
    * .mai - mail (VAX)
    * .mak - makefile
    * .mak - project file (Visual Basic)
    * .man - command manual
    * .map - color palette
    * .map - format data (Micrografx Picture Publisher)
    * .map - linker map file
    * .map - map (Atlas MapMaker)
    * .map - network map (AccView)
    * .mbx - mailbox data (ZERBERUS)
    * .mci - MCI command script (Media Control Interface)
    * .mcp - printer driver (Mathcad)
    * .mcw - text file (MacWrite II)
    * .mdm - modem definition (TELIX)
    * .meu - menu group (DOS Shell)
    * .mid - standard MIDI file (music synthetizers)
    * .mke - makefile (MS Windows SDK)
    * .mod - MODULA-2 source code file (Clarion Modula-2)
    * .mod - Windows kernel module
    * .mon - monitor description (ReadMail)
    * .mov - movie (AutoCAD AutoFlix)
    * .mp2 - MPEG audio file (xing)
    * .mpc - calender file (MS Project)
    * .mpg - MPEG animation
    * .msg - message
    * .msp - bitmap graphics (Microsoft Paint)
    * .mst - setup script (MS Windows SDK)
    * .mth - math file (Derive)
    * .mtm - MultiTracker Module music
    * .mtw - datafile (Minitab)
    * .mu - menu (Quattro Pro)
    * .mus - sound file (MusicTime)
    * .mvf - stop frame file (AutoCAD AutoFlix)
    * .mvi - movie command file (AutoCAD AutoFlix)
    * .mvw - log file (Saber LAN)
    * .mxt - (MS C)

N

    * .nws - info text file (latest news) (ASCII)
    * .nxt - sound (NeXT format)

O

    * .obj - object code (Intel Recolatable Object Module)
    * .ocx - OLE custom control
    * .off - Object File Format vector graphics
    * .old - backup file
    * .ovl - overlay file (part of program to be loaded when needed)
    * .ovr - overlay file (part of program to be loaded when needed)

P

    * .pac - STAD Image (graphics ?)
    * .pac - package (SBStudio II)
    * .pal - color palette
    * .par - permanent output file (Windows 3.x)
    * .pcc - cutout picture vector graphics (PC Paintbrush)
    * .pch - patch file
    * .pct - bitmap graphics (Macintosh b&w PICT1 - color PICT2)
    * .pcw - text file (PC Write)
    * .pcx - bitmap graphics (PC Paintbrush)
    * .pda - bitmap graphics
    * .pdv - printer driver (Paintbrush)
    * .pgm - Portable Grayscale bitMap graphics
    * .pgm - program (Signature)
    * .pgp - support file (Pretty Good Privacy RSA System)
    * .pgs - manual page (man4dos)
    * .pic - PIXAR picture file (SDSC Image Tool)
    * .pic - bitmap graphics (Macintosh b&w PICT1 - color PICT2)
    * .pic - bitmap graphics (many eg. Lotus 1-2-3 - PC Paint)
    * .pif - Program Information File (Windows 3.x)
    * .pif - vector graphics GDF format (IBM mainframe computers)
    * .pit - compressed Mac file archive created by PACKIT (unpackit.zoo)
    * .pll - pre-linked library (Clipper 5)
    * .pnt - Macintosh painting
    * .pop - messages index (PopMail)
    * .pop - pop-up menu object (dBASE Application Generator)
    * .prd - printer driver (many)
    * .pub - public key ring file (Pretty Good Privacy RSA System)

Q

    * .qpr - print queue device driver (OS/2)
    * .qpx - compiled query program (FoxPro)
    * .qrt - QRT ray tracing graphics
    * .qry - query (dBASE IV)
    * .qt - QuickTime movie (animation)
    * .qwk - QWK reader message file
    * .qxd - document (QuarkXPress)
    * .qxl - element library (QuarkXPress)

R

    * .rdi - device-independent bitmap file (RIFF RDIB format)
    * .rdx - datafile (Reflex)
    * .rec - datafile (EpiInfo)
    * .rec - record file (Sprint)
    * .rec - recorded macro file (Windows 3.x)
    * .red - path info (Clarion Modula-2)
    * .ref - cross-reference
    * .reg - OLE Registration (Windows 3.x)
    * .reg - registration (Corel programs)
    * .rem - remarks
    * .rgb - SGI RGB image file (SDSC Image Tool)
    * .rif - RIFF bitmap graphics (Fractal Design Painter)
    * .rip - graphics (Remote Access)
    * .rix - bitmap graphics (ColorRIX VGA Paint)
    * .rmk - makefile (RMAKE)
    * .rpt - report
    * .rtf - Windows Help file script
    * .rtl - text file

S

    * .sav - backup file (saved file)
    * .sav - configuration
    * .sav - saved game situation (eg. NetHack)
    * .sbd - storyboard (Storyboard Editor)
    * .sbi - Sound Blaster Instrument file (Creative Labs)
    * .sbr - support file (Source Browser)
    * .scc - text file
    * .scr - DEBUG source code file (DOS Debug)
    * .scr - screen saver (Windows 3.x)
    * .scx - bitmap graphics (ColorRIX)
    * .sea - Self-Extracting compressed Macintosh file Archive
    * .sec - secret key ring file (Pretty Good Privacy RSA System)
    * .sec - secured animation file (Disney Animation Studio)
    * .set - setup options file
    * .sgi - graphics (IRIS - Silicon Graphics)
    * .sig - current program settings (Signature)
    * .sig - signature file (PopMail)
    * .sit - compressed Macintosh archive created by STUFFIT (unsit30.zip)
    * .smp - sample (sound file)
    * .smt - text file (Smart Ware II)
    * .snd - digitized sound file (Macintosh/ATARI/PC)
    * .spl - sample
    * .sum - Summary
    * .swp - swap file (DOS)
    * .sys - datafile (SYGRAPH - SYSTAT - SPSS/PC)
    * .sys - system file - device driver or hardware configuration info (DOS)

T

    * .tbl - graphics (native format) (PageMaker TableEditor)
    * .tbl - table of values (OS/2)
    * .tel - host file (Telnet)
    * .tga - TrueVision Targa bitmap graphics
    * .tmp - temporary file
    * .toc - Table Of Contents
    * .tre - directory tree file (PC-Tools)
    * .trm - terminal settings (Windows 3.x)
    * .tut - tutorial

U

    * .ub - audio file (unsigned byte)
    * .uhs - Universal Hint System (binary file)
    * .uif - long prompts for windows (WordPerfect for Win)
    * .unx - text file containing UNIX specific info
    * .upd - program update info
    * .usr - user database file (Procomm Plus - Turbo C++ tour)

V

    * .vbx - Visual Basic eXtension (Visual Basic)
    * .vga - VGA display driver
    * .vga - VGA display font
    * .vgd - VGA display driver (Generic CADD)
    * .vid - MS-DOS Shell Monitor file (MS-DOS 5)
    * .vid - bitmap graphics (YUV12C M-Motion Frame Buffer)
    * .vid - screen device driver (Word)
    * .voc - digitized samples (Creative Voice file)
    * .vst - Truevision Vista bitmap graphics
    * .vue - animation (3D Studio)
    * .vxd - Windows 3.x virtual device driver (QEMM)

W

    * .w31 - startup file (Windows 3.1)
    * .wav - Waveform audio file (RIFF WAVE format)
    * .wbf - MS Windows Batch File (Catch)
    * .wbt - batch file (WinBatch)
    * .web - WEB source code file
    * .woa - swap file (Windows 3.x)
    * .wrs - Windows Resource eg. printer driver (WordPerfect for Win)

X

    * .xbm - X11 Bitmap graphics
    * .xll - Excel Dynamic Link Library (MS Excel)
    * .xmi - compressed eXtended MIdi music
    * .xwd - X Window System window dump image graphics (SDSC Image Tool)
    * .xx - compressed file ASCII archive created by XXENCODE (uuexe515.exe)
    * .xxe - compressed file ASCII archive created by XXENCODE (uuexe515.exe)

Z

    * .zip - compressed file archive created by PKZIP (pkz204g.exe)
    * .zoo - compressed file archive created by ZOO (zoo210.exe)