B
BAK::: Backup file
BK :::::::::: Corel Draw AutoBackup
BAS:::::: BASIC code
BAT:::::::: Batch file
BFC :::::::;Windows 95 Briefcase
BG :::::::::;Backgammon for Windows game
BI::::::::::::: Binary file
BIF:::::::: GroupWise initialization file
BIN :::::::Binary file
BK:::::::: Sometimes used to denote backup versions
BK$ ::::::::Also sometimes used to denote backup versions
BKS:::::::::::: An IBM BookManager Read book****f
BMK ::::::::::An A bookmark file
BMP::::::::: Windows or OS/2 bitmap
BM1 ::::::::::::Apogee BioMenace data file
BRX:::::::::::::: A file for browsing an index of multimedia options
BSP::::::::::::::::: Quake map
BS1 :::::::::::::Apogee Blake Stone data file
BTM::::::::::::: Batch file used by Norton Utilities
B4 ::::::::::::Helix Nuts and Bolts file

C
C C::::::::: code
CAB:::::::::: Microsoft cabinet file program files compressed for software distribution
CAL :::::::::CALS Compressed Bitmap
CAL ::::::::::Calendar schedule data
CAS ::::::::::::Comma-delimited ASCII file
CAT::::::::::: IntelliCharge categorization file used by Quicken
CB::::::::: Microsoft clean boot file
CCB::::::::::: Visual Basic Animated Button configuration
CCF::::::::::::; Multimedia Viewer configuration file used in OS/2
CCH Corel Chart
CCM ::::::::::::::Lotus CC:Mail
CDA:::::::::::::: CD Audio Track
CDF:::::::::::::::: Microsoft Channel Definition Format file
CDI::::::::::::: Phillips Compact Disk Interactive format
CDR ::::::::::Core Draw drawing
CDT:::::::::; Corel Draw template
CDX:::::: Corel Draw compressed drawing
CEL:::::: CIMFast Event Language file
CFB::::::::::; Comptons Multimedia file
CFG :::::::;;Configuration file
CGI ::::::::::Common Gateway Interface ****** file
CGM:::::::::: Computer Graphics Metafile
CHK :::::::::File fragments saved by Windows Disk Defragmenter or ScanDisk
CHP :::::::::::::::::::;;;Ventura Publisher chapter
CIL :::::::::::::Clip Gallery download package
CIM ::::::::::::::Sim City 200 file
CLASS:::::::::::::: Java class
CLP::::::::::; Windows Clipboard file
CLS ::::::::Visual Basic Class Module
CMD:::::::::::: DOS CP/M command file
CMD::::::::: dBase-II program file
CMF:::::::::::::: Corel Metafile
CMP::::::::: JPEG Bitmap
CMP :::::::Address
CMV :::::::::Corel Move animation
CMX::::::::: Corel Presentation Exchange image
CNF:::::: Configuration file used by Telnet, Windows, and other applications
CNM ::::::::;;;Windows application menu options and setup file
CNQ::::::::: Compuworks Design Shop file
CNT:::::: Windows (or other) system ******* files for the help index and other purposes
COB::::::::: trueSpace2
COD :::Microsoft C compiler output as displayable assembler with original C as comments
CPD :::::::::::::Fax Cover
CPE ::::::::::::Fax Cover
CPI ::::::::::::Microsoft MS-DOS code page information file
CPL :::::::::::::Control Panel extension
CPL:::::::::::: Corel colour palette
CPP::::::::: C++ code
CPR ::::::::Corel Presents Presentation
CPT :::::::::Corel Photo-Paint image
CPX :::::::Corel Presentation Exchange Compressed drawing
CRD:::::::::::: Cardfile file
CRP :::::::::::Corel Presents Run-Time Presentation
CRT :::::::::;Certificate file
CSC:::::::::::: Corel
CSP::::::::::::; PC Emcee On-Screen image
CSV:::::::::: Comma-separated values file
CT :::::::::Scitex CT Bitmap
CTL:::::::::::: Used in general to mean a file containing control information.
CUE:::::::: Microsoft Cue Cards data
CUR:::::::::::::: Windows Cursor
CUT::::::::: Dr Halo bitmap
CV ::::::::Corel Versions archive
CV:::::::::: Microsoft CodeView information screen
CWK :::::::::::::::Claris Works data file
CWS :::::::::::Claris Works template
CXX::::::::: C++ source code file

D
DAT:::::::::; Data file
DAT:::::::::: WordPerfect Merge Data
DBF:::::::::: Aston-Tate dBASE database
DBX :::::::::::DataBeam image
DCR ::::::::::::;Shockwave file
DCS::::::::: Desktop Color Separation file
DCX::::::::::: Fax image based on PCX
DDF:::::::::: BTRIEVE database
DEF ::::::::::;SmartWare II data file
DEF:::::::::::; C++ Definition
DER:::::::::::; Certificate file
DIB::::::::::::: Device-Independent Bitmap
DIC :::::::::::::::::::::Dictionary
DIF :::::Data Interchange Format spreadsheet
DIR:::::::::: Macromedia Director file
DIZ:::::::::: De******ion file
DLG C++::::::::: Dialogue
DLL::::::::::: Dynamic-Link Library
DMF :::::::::X-Trakker music module (MOD) file
DOC ::::::::FrameMaker or FrameBuilder
DOC :::::::::WordStar
DOC :::::::::::WordPerfect
DOC::::::::::::: Microsoft Word
DOT:::::::::::::::: Microsoft Word ******** Template
DPR:::::::::::; Borland Delphi project header file
DRV :::::::::::::::;;;;Driver
DRW ::::::::::::::::;Micrografx Designer/Draw
DSG:::::::::::::::: DooM saved game
DSM :::::::::::::Dynamic Studio music module (MOD) file
DSP :::::::::::::Microsoft Developer Studio project
DSQ ::::::::::::;;Corel QUERY file
DSW :::::::::::::Microsoft Developer Studio workspace
DWG :::::::::::AutoCAD drawing eXchange format
DXF ::::::::::::;AutoDesk Drawing Interchange format

E
EMF::::::::::::: Enhanced Windows Metafile
ENC::::::::::::::: Encore file
EPS::::::::: Encapsulated Post****** image
ER1:::::::::::::: ERWin file
ERX :::::::::::::ERWin file
EVY:::::::::::: Envoy
EWL:::::::::::: Microsoft Encarta
EXE:::::::::: Executable file

F
F :::::::::::FORTRAN file
F77::::::::::::::: FORTRAN file
F90 :::::::::::::::FORTRAN file
FAR::::::::::: Farandole Composer music module (MOD) file
FAV ::::::::::::::Microsoft Outlook navigation bar
FAX::::::::::::::;; FAX Type image
FH3 ::::::::::::::Aldus Freehand 3 drawing
FIF::::::::::::::; Fractal image file
FITS ::::::::::::CCD camera image
FLC:::::::::; AutoDesk FLIC animation
FLI:::::::::::: AutoDesk FLIC animation
FLT::::::::::::: Corel filter
FLT :::::::::::::StarTrekker music module (MOD) file
FMB::::::::::::: Oracle binary source code for form, version 4.0 and later
FMT :::::::::::::::Oracle **** format of form, version 4.0 and later
FMT::::::::::::::: Microsoft Schedule+ print file
FMX::::::::::: Oracle executable form, version 4.0 and later
FOG:::::::::: Fontographer font
FON ::::::::::::::System font
FOR:::::::::::::: FORTRAN file
FOT:::::::::::::; Font-related file
FP::::::::::::::; FileMaker Pro file
FP1:::::::::::: Flying Pigs for Windows data file
FP3:::::::::::::::;; FileMaker Pro file
FPX::::::::::::::::: FlashPix bitmap
FRM::::::::::::::::: Form
FRM::::::::::::: FrameMaker or FrameBuilder
FRM:::::::;; Oracle executable form version 3.0 and earlier
FRM::::::::::;; Visual Basic form
FRM ::::::::WordPerfect Merge form
FRX :::::::::::Visual Basic form stash file

G
GAL::::::::: Corel Multimedia Manager album
GCP ::::;;Ground Control Point file used in image processing of remote sensing data .
GED:::::::; Graphic Environment drawing
GEM ::::::::GEM metafile
GEN :::::::::;;Ventura-Generated file
GFC:::::::::; Patton&Patton Flowcharting 4 flowchart file
GFI ;::::::::::::Genigraphics Graphics Link presentation
GFX ::::::::::::;Genigraphics Graphics Link presentation
GID ::::::::;Windows 95 global index file
GIF:::::::::;; CompuServe bitmap
GIM ::::::::Genigraphics Graphics Link presentation
GIX::::::::: Genigraphics Graphics Link presentation
GNA :::::::::;;Genigraphics Graphics Link presentation
GNX:::::::::; Genigraphics Graphics Link presentation
GRA:::::::::::::; Microsoft Graph
GRD :::::Grid file, used in image processing of remote sensing data often to form map projections
GRP:::::::::: Program Manager Group
GTK :::::::::;Graoumftracker (old) music module (MOD) file
GT2 ::::::::;Graoumftracker (new) music module (MOD) file
GWX::::::::::; Genigraphics Graphics Link presentation
GWZ:::::::::; Genigraphics Graphics Link presentation
GZ ::::::::::;Unix Gzip compressed file

H
H C:::::::::::: program header
HED::::::::: HighEdit
HEL::::::::; Microsoft Hellbender saved game
HEX:::::::::: Macintosh BinHex 2.0 file
HGL:::::::::::::;; HP Graphics Language drawing
HLP ::::::::Help file
HOG :::::::::;Lucas Arts Dark Forces WAD file
HPJ :::::::::;;Visual Basic Help Project
HPP :::::::::::C++ program header
HQX:::::::;; Macintosh BinHex 4.0 file
HST :::::::::::History file
HT ::::::::::;HyperTerminal
HTM :::::::::Hyper
HTML:::::::; Hyper
HTX::::::::: Extended HTML template

I
ICA Citrix file
ICB::::::: Targa bitmap
ICM :::::::::Image Color Matching profile file
ICO:::::::::: Windows Icon
IDD::::::: MIDI Instrument Definition
IDQ :::::::::Internet Data Query file
IFF :::::::::;;Amiga ILBM
IGF:::::::::; Inset Systems metafile
IIF::::::;; QuickBooks for Windows interchange file
IMA::::::::: WinImage file
IMG:::::::: GEM image
INC::::::::: Assembler language or Active Server include file
INF:::::::::: Information file
INI :::::::::::Initialization file
INP :::::::Oracle source code for form, version 3.0 and earlier
INS:::::::::: InstallShield install
INS ::::::::::X-Internet sign-up file
ISO ::::::::::::Lists the files on a CD-ROM; based on the ISO 9660 CD-ROM file system standard
ISP X-Internet sign-up file
ISU :::::::::;InstallShield uninstall
IT :::::::;;Impulse Tracker music module (MOD) file
IW :::::::::Idlewild screensaver

MDA::::::::: Microsoft Access add-in
MDB :::::::::;;Microsoft Access database
MDE::::::::: Microsoft Access MDE file
MDL :::::::::Digital Tracker music module (MOD) file
MDL:::::::::::: Quake model file
MDN :::::::::;Microsoft Access blank database template
MDW ::::::::::::Microsoft Access Workgroup
MDZ::::::::::::;; Microsoft Access wizard template
MED ::::::::::Music Editor, OctaMED music module (MOD) file
MER::::::: Format for interchanging spreadsheet/database data; recognized by Filemaker, Excel, and others
MET :::::::::::;Presentation Manager metafile
MI ::::::::::::Miscellaneous
MIC ::::::::::;;Microsoft Image Composer file
MID:::::::::::: MIDI music
MMF:::::::::;;;; Microsoft Mail File
MMM::::::::::::: Microsoft Multimedia Movie
MOD::::::::::: FastTracker, StarTrekker, Noise Tracker (etc.) music module file
MOD:::::::::::: Microsoft Multiplan spreadsheet
MOV ::::::::::::::QuickTime for Windows movie
MPE::::::::::: MPEG animation
MPEG::::::::::::::: MPEG animation
MPG::::::::::::: MPEG animation
MPP :::::::::::::;;Microsoft Project file
MPP::::::::::::: CAD drawing file format
MP3::::::::::: MPEG Audio Layer 3 (AC3) file
MSG:::::::::: Microsoft Mail message
MSN ::::::::Microsoft Network
MSP ::::::::Microsoft Paint bitmap
MTM:::::::::::: MultiTracker music module (MOD) file
MUS:::::::::;;; Music
MVB:::::::: Microsoft Multimedia Viewer file
MWP::::::: Lotus Wordpro 97 Smartmaster file

N
NAP::::::: NAP Metafile
NCB::::::: Microsoft Developer Studio file
NSF :::::::;;Lotus Notes database
NST::::::: Noise Tracker music module (MOD) file
NTF:::::: Lotus Notes database template

O
OBD::::::::::;; Microsoft Office binder template
OBD:::::::: Microsoft Office Binder
OBJ ::::::::::::;****** file
OBZ:::::::::::; Microsoft Office Binder Wizard
OCX::::::: Microsoft ****** Linking and Embedding custom control
OFN::::::::::::::: Microsoft Office FileNew file
OFT::::::::::: Microsoft Outlook template
OKT:::::::::::: Oktalyzer music module (MOD) file
OLB :::::::::::OLE Library
OLE ::::::::::;OLE
OPT:::::::::::; Microsoft Developer Studio file
ORG :::::::::::Lotus Organiser file
OR2 ::::::::::;Lotus Organiser 2 file
OR3 :::::::::Lotus Organiser 97 file

P
P10 :::::::::::::Tektronix Plot 10 drawing
PAB:::::::::: Microsoft Personal Address Book
PAK::::::::::: Quake WAD file
PAL ::::::::::::::::Window:s colour palette
PAT ::::::::::::Corel Draw pattern
PBK ::::::::::Microsoft Phonebook
PBM ::::::::::;Portable Bitmap
PCD:::::::: Kodak Photo-CD image
PCL:::::::::::::: HP Laserjet bitmap
PCS ::::::::::::::::::PICS animation
PCT:::::::::::::::: Macintosh PICT drawing
PCX:::::::::::::::::: ZSoft PC Paintbrush bitmap
PDF::::::::::: Adobe Acrobat Portable ******** Format or Netware Printer Definition File
PDF :::::::::::::Package Definition File from Microsoft Systems Management Server
PDQ ::::::::::::Patton&Patton Flowcharting PDQ Lite file
PFA:::::::::::::::::: Type 1 font ASCII
PFB :::::::::::::Type 1 font binary
PFC :::::::::::::::F Component
PFM ::::::::::::Printer Font Metrics
PGL:::::::::::::; HP Plotter drawing
PGM::::::::::::::: Portable Graymapbitmap
PIC :::::::::::::::::::::;PC Paint bitmap
PIC::::::::::::::::::::::::: Lotus picture
PIC:::::::::::::: Macintosh PICT drawing
PIF::::::::::::: Program Information File
PIF::::::::::::::: IBM PIF drawing
PIG:::::::::::: Lucas Arts Dark Forces WAD file
PIN ::::::::::::Epic Pinball data file
PIN :::::::::::::::Epic Pinball data file
PIX:::::::::::::: Inset Systems bitmap
PJ:::::::::::::: MKS Source Integrity fill
PKG ::::::::Microsoft Developer Studio application extension (similar to a DLL file
PL::::::::::: Perl program
PLT ::::::::::::HPGL Plotter drawing
PLT ::::::::::::::AutoCAD Plot drawing
PM5 :::::::::Pagemaker 5.0 file
PM6 :::::::::Pagemaker 6.0 file
P65::::::::::: Pagemaker 6.5 file
PNG:::::::::::; Portable Network Graphics bitmap
PNG::::::::::: Paint Shop Pro Browser catalogue
PNT :::::::::::;MacPaint graphic file
POT:::::::::::: Microsoft PowerPoint Template
PP4 ::::::::::::Picture Publisher 4 bitmap
PPA::::::::::: Microsoft PowerPoint Add-in
PPM::::::::::::; Portable Pixelmap bitmap
PPS :::::::::Microsoft PowerPoint slide show
PPT::::::::: Microsoft PowerPoint presentation
PRE :::::::;;Lotus Freelance presentation
PRF ::::::::::;Windows system file
PRN::::::::::; Print Table (space delimited
PRS :::::::::;Harvard Graphics for Windows presentation
PRZ :::::::::::Lotus Freelance Graphics 97 file
PS:::::::::: Post****** Interpreted drawing
PSD::::::;; Adobe Photoshop bitmap
PST ::::::::;Microsoft Outlook Personal Folder File
PTM:::::::::; Polytracker music module (MOD) file
PUB :::::;Ventura Publisher publication
PUB :::::::;Microsoft Publisher
PWD ::::::::Microsoft Pocket Word
PWZ:::::: Microsoft PowerPoint Wizard
PXL::::::: Microsoft Pocket Excel spreadsheet

Q
QAD:::::::::: PF QuickArt
QBW::::::::::::: QuickBooks for Windows file
QLB :::::::::::;;Quick Library
QRY :::::::::Microsoft Query
QT ::::::::::QuickTime Movie
QTM :::::::::QuickTime Movie
QXD:::::::: Quark XPress file

R
R:::::: Pegasus Mail resource file
RA:::::::: Real Audio sound
RAM::::::::; Real Audio sound
RAS ::::::::::Sun Raster Images bitmap
RAW :::::::::Raw File Format (bitmap)
RC::::::: Microsoft Visual C++ Resource
REC::::::::: Recorder macro
REG::::::::: Registration file
RES::::::::: Microsoft Visual C++ Resource
RFT::::::::: RFT-DCA
RLE::::::::::: Run-Length Encoded bitmap
RM :::::::::::Real Audio video file
RMI ::::::::MIDI music
ROV :::::::::::Rescue Rover data file
RPT::::::::: Microsoft Visual Basic Crystal Reports file
RTF ::::::::::::Rich **** Format
RTM::::::::: Real Tracker music module (MOD) file

S
SAM ::::::::::Ami Professional
SAV ::::::::Saved game file
SCC ::::::::;Microsoft Source Safe file
SCD :::::::Matrix/Imapro SCODL slide image
SCD :::::::::Microsoft Schedule+ 7
SCH ::::::;Microsoft Schedule+ 1
SCN:::::: trueSpace2 scene
SCP :::::::;Dial-Up Networking
SCR::::::::: Windows screensaver
SCR ::::::::::Fax image
SCT::::::::;; Scitex CT bitmap
SC2 :::::::::Microsoft Schedule+ 7
SDL:::::::::::;; SmartDraw library
SDR ::::::::::::SmartDraw drawing
SDT::::::: SmartDraw template
SEA ::::::Self-expanding archive
SEP:::::::::: Tagged Image File Format (TIFF) bitmap
SHB :::::::::::::Corel Show presentation
SHB :::::::::::::: shortcut file
SHG :::::::::::::::Hotspot bitmap
SHS ::::::::::: scrap file
SHW:::::::::::: Corel Show presentation
SIT :::::::::::Stuffit archive of Mac files
SLK:::::::::: Symbolic Link (SYLK) spreadsheet
SND :::::::::::::NeXT sound
SND:::::::::;; Mac Sound Resource
SQC :::::::::Structured Query Language (SQR) common code file
SQR:::::: Structured Query Language (SQR) program file
STM::::::: Scream Tracker music module (MOD) file
STY:::::::::;; Ventura Publisher style sheet
SVX :::::::;;;Amiga 8SVX sound
SYS:::::::::::::; System file
S3M:::::::::::; Scream Tracker 3 music module (MOD) file

T
TAR:::::::::; Tape Archive
TAZ ::::::::::Unix Gzip/Tape Archive
TEX ::::::::;;****ure file
TGA::::::::::;; Targa bitmap
TGZ :::::::::::Unix Gzip/Tape Archive
THEME :::::::::::Windows 95 Desktop Theme
THN::::::::: Graphics Workshop for Windows thumbnail
TIF ::::::::::Tag Image File Format (TIFF) bitmap
TIFF::::::::: Tag Image File Format (TIFF) bitmap
TIG:::::::: Tiger file, used by US government to distribute maps
TLB ::::::::::OLE Type Library
TMP ::::::::::Windows temporary file
TRM:::::::::: Terminal file
TRN ::::::::::;MKS Source Integrity project usage log
TTF::::::::::::: TrueType font
TWF::::::::::::: TabWorks file
TWW::::::::: Tagwrite Template
TX8::::::::::: MS-DOS
T2T :::::::Sonata CAD modelling software file

U
UDF::::::: Windows NT Uniqueness Database File
ULT::::::: Ultratracker music module (MOD) file
URL ::::::::;Internet shortcut
USE::::::::: MKS Source Integrity file

V
VBP ::::::::Visual Basic Project
VBW::::::: Microsoft Visual Basic workspace
VBX :::::::::Visual Basic custom control
VDA:::::::::: Targa bitmap
VI ::::::Virtual Instrument file from National Instruments LABView product
VLB :::::::::::Corel Ventura Library
VOC:::::: Creative Labs Sound Blaster sound
VP ::::::::Ventura Publisher publication
VST::::::: Targa bitmap
VSW::::::: Visio Workspace file
VXD :::::Microsoft Windows virtual device driver

W
WAD ::::Large file for Doom game containing video, player level, and
other information
WAV:::::::::::: Windows Waveform sound
WB1 ::::::::::QuattroPro for Windows spreadsheet
WB2 :::::::::QuattroPro for Windows spreadsheet
WBK:::::::: Microsoft Word Backup
WBL::::::: Argo WebLoad II upload file
WCM::::::::::: WordPerfect Macro
WDB:::::::::: Microsoft Works database
WEB ::::::::::CorelXara Web
WGP :::::::::Wild Board Games data file
WID :::::::::::Ventura width table
WIL::::::::::::::: WinImage file
WIZ::::::::::::::::::: Microsoft Word Wizard
WK1 :::::::;Lotus 123 versions 1 & 2 spreadsheet
WKS ::::::::::Microsoft Works
WLF::::::::: Argo WebLoad I upload file
WLL:::::::::: Microsoft Word Add-In
WMF:::::::::; Windows Metafile
WOW :::::::Grave Composer music module (MOD) file
WP::::::::: WordPerfect
WPW ::::::::Novel PerfectWorks
WPD:::::::: WordPerfect Demo
WPG::::::::; WordPerfect Graphic
WPS:::::::: Microsoft Works
WPT ::::::::WordPerfect Template
WQ1::::::::;; QuattroPro/DOS spreadsheet
WRI ::::::::::::::Write
WRL::::::::::::;; Virtual Reality model
WS1 :::::::::WordStar for Windows 1
WSD::::::: WordStar 2000
WVL::::::: Wavelet Compressed Bitmap

X
XAR ::::::::::Corel Xara drawing
XLA:::::::: Microsoft Excel add-in
XLB::::::: Microsoft Excel toolbar
XLC ::::::::::Microsoft Excel chart
XLD :::::::::Microsoft Excel dialogue
XLK::::::::::: Microsoft Excel backup
XLM :::::::;Microsoft Excel macro
XLS::::::::: Microsoft Excel worksheet
XLT::::::: Microsoft Excel template
XLV :::::::Microsoft Excel VBA module
XLW::::::::: Microsoft Excel workbook / workspace
XM::::::: FastTracker 2, Digital Tracker music module (MOD) file
XR1 ::::::::Epic MegaGames Xargon data file
XTP;:::::::: XTree data file
XY3::::::: XYWrite III
XY4::::::: XYWrite IV
XYP:::::::: XYWrite III Plus
XYW:::::::: XYWrite for Windows 4.0

Y
YAL:::::::: Arts & Letters clipart library
YBK:::::::; Microsoft Encarta Yearbook

Z
Z :::::::::::::::::::::::::::::::::::;Unix Gzip
ZIP :::::::::::::::::::::::::::::::::::::Zip file
ZOO:::::: An early compressed file format