A
 

A	Object code library
AA	Audible audio file (commonly used for downloadable audio books)
AAM	Authorware shocked file
AAS	Authorware shocked packet
AB	Applix Builder file
ABF	Adobe Binary Screen Font
ABK	Corel Draw AutoBackup
ABO	Applix Builder Turbo file
ABS	MPEG Audio Sound file
ABS	Sometimes used to denote an abstract (as in an abstract or summary of a scientific paper) AutoBackup
ACA	Project Manager Workbench file
ACB	ACBM Graphic image
ACC	DR-DOS Viewmax file
ACE	ACE Archiver Compression file
ACL	Corel Draw 6 keyboard accelerator file
ACM	Windows system directory file
ACM	Dynamic Link Library (DLL)
ACP	Microsoft Office Assistant Preview file
ACR	American College of Radiology file
ACT	Microsoft Office Assistant Actor file
ACT	FoxPro Foxdoc Action Diagram
ACT	Action Presentation
ACV	Used to Compress and decompress audio data
AD	After Dark screensaver
ADA	Ada source text file (non-GNAT)
ADB	Ada source text body file (GNAT)
ADB	HP 100LX Organizer Appointment database
ADC	Scanstudio 16 color Bitmap Graphic file
ADD	OS/2 adapter driver file used in the boot process
ADF	Amiga disk file
ADI	AutoCAD device-independent binary plotter file
ADL	QEMM Mca adaptor description library
ADM	After Dark MultiModule screensaver
ADM	Windows NT policy template
ADN	Lotus 1-2-3 Add-In file
ADP	FaxWorks Faxmodem setup file
ADP	Astound Dynamite file
ADR	After Dark Randomizer screensaver
ADR	Smart Address address book
ADS	Ada source text specification file (GNAT)
ADT	HP NewWave datafile for card applications
ADT	AdTech Fax file
ADX	Dynazip Active Delivery script
ADX	Lotus Approach dBase Index
ADX	Archetype Designer Document
AF2	ABC FlowCharter 2.0 Flowchart
AF3	ABC Flowchart
AFC	Apple Sound file
AFI	Truevision Bitmap graphic
AFM	Adobe font metrics
AFM	HP NewWave Cardfile application
AG	Applix graphic
AI	Adobe Illustrator drawing
AI	Corel Trace drawing
AIF	Audio Interchange File, a sound format used by Silicon Graphics and Macintosh applications
AIFC	Similar to AIF (compressed)
AIFF	Similar to AIF
AIM	AOL Instant Messenger Launch file
AIN	AIN Compressed archive
AIO	APL transfer file
AIS	ACDSee Image Sequence
AIS	Velvet Studio Instruments file
AIS	Xerox Arry of Intensity Samples Graphic
AIX	HP NewWave Cardfile Application data
AKW	Contains all A-keywords in the RoboHELP Help Project Index Designer not associated with topics
ALAW	European Telephony audio
ALIAS	Alias Image
ALB	JASC Image Commander album
ALL	Arts & Letters Library
ALL	WordPerfect for Windows General printer information file
ALS	Alias Image
ALT	WordPerfect Library Menu
AM	Applix SHELF Macro
AMF	Music file (Advanced Module Format)
AMG	AMGC Compressed archive
AMG	ACTOR System image
AMS	Velvet Studio music module (MOD) file
AMS	Extreme's Tracker module
ANC	Canon Computer Pattern Maker file that is a selectable list of pattern colors
ANI	Microsoft Windows Animated cursor
ANM	DeluxPaint Animation
ANN	Windows 3.x Help annotation
ANS	ANSI Text file
ANT	SimAnt for Windows saved game
AOS	Nokia 9000 Add-on software
AP	Applix Presents file
AP	WHAP Compressed Amiga archive
APC	Lotus 1-2-3 Printer driver
APD	Lotus 1-2-3 Printer driver
APF	Lotus 1-2-3 Printer driver
API	Application Program Interface; used by Adobe Acrobat
API	Lotus 1-2-3 Printer driver
APL	APL Workspace file
APP	Symphony Add-in Application
APP	dBase Application Generator Object
APP	DR-DOS Executable Application
APP	FoxPro Generated Application
APR	Employee Appraiser Performance Review file
APR	Lotus Approach 97 View file
APS	Microsoft Visual C++ file
APT	Lotus Approach Data view file
APX	Lotus Approach Paradox-Specific information file
APX	Borland C++ Appexpert database
AQ	Applix data
ARC	LH ARC (old version) compressed archive
ARC	SQUASH Compressed archive
ARF	Automatic Response file
ARI	ARI Compressed archive
ARI	Aristotle audio file
ARJ	Robert Jung ARJ compressed archive (ARJ)
ARK	ARC File Archiver CPM/Port archive
ARL	AOL v4.0 organizer file
ARR	Atari Cubase Arrangement
ART	Xara Studio drawing
ART	Canon Crayola art
ART	Clip Art
ART	Ray Tracer file
ART	First Publisher Raster graphic
ART	AOL Image file compressed using the Johson-Grace compression algorithm
ARX	ARX Compressed Archive
AS	Applix Spreadsheet
ASA	Microsoft Visual InterDev file
ASC	ASCII text file
ASC	PGP armored encrypted file
ASD	WinWord AutoSave file
ASD	Lotus 1-2-3 Screen driver
ASD	Microsoft Advanced Streaming Format (ASF) description file; opens with NSREX
ASD	Astound Presentation
ASE	Velvet Studio Sample file
ASF	Microsoft Advanced Streaming Format
ASF	StratGraphics Datafile
ASF	Lotus 1-2-3 Screen font
ASH	TASM 3.0 Assembly language header
ASI	Borland C++/Turbo C Assembler Include file
ASM	Assembler Language source file
ASM	Pro/E assembly file
ASO	Astound Dynamite Object
ASP	Active Server Page (an HTML file containing a Microsoft server-processed script)
ASP	Procomm Plus setup and connection script
ASP	Astound Presentation
AST	Astound multimedia file
AST	Claris Works "assistant" file
ASV	DataCAD Autosave file
ASX	Cheyenne Backup script
ASX	Microsoft Advanced Streaming Redirector file
ASX	Video file
AT2	Aldus Persuasion 2.0 Auto Template
ATM	Adobe Type Manager data/info file
ATT	AT&T Group 4 bitmap
ATW	AnyTime Deluxe for Windows personal information manager file from Individual Software MultiModule screensaver
AU	Sun/NeXT/DEC/UNIX sound file
AU	Audio U-law (pronounced mu-law)
AUX	TeX/LaTeX Auxilliary Reference file
AUX	ChiWriter Auxilliary Dictionary file
AVA	Avagio Publication
AVB	Inculan Anti-Virus virus infected file
AVI	Microsoft Audio Video Interleaved file for Windows movie
AVR	Audio Visual Research file
AVS	Application Visualization System file
AVS	Stardent AVS-X Image
AW	HP AdvanceWrite Text file
AW	Applix Words file
AWD	FaxView Document imagine
AWK	AWK Script/Program
AWM	Animation Works Movie
AWR	Telsis file for digitally stored audio
AWS	StatGraphics Data file
AXX	ARJ compressed file from a multi-volume archive (xx = a number from 01 to 99)
A3L	Authorware 3.x library
A4L	Authorware 4.x library
A5L	Authorware 5.x library
A3M	Authorware MacIntosh file (unpackaged)
A4M	Authorware MacIntosh file (unpackaged)
A4P	Authorware file (packaged without runtime)
A3W	Authorware Windows file (unpackaged)
A4W	Authorware Windows file (unpackaged)
A5W	Authorware Windows file (unpackaged)

B
 

B	Applause Batch list
BAD	Oracle bad file
BAK	Backup file
BAL	Ballade Music score
BAR	dBase Application Generator Horizontal menu object
BAS	BASIC source code
BAT	Batch file
BB	Papyrus Database backup
BBL	TeX/BibTeX Bibliographic reference file
BBM	Deluxe Paint Bitmap image
BBS	Bulletin Board Sytem text
BCH	Batch Process Object (dBase Application Generator)
BCH	Datalex Entry Point 90 Data file
BCM	Microsoft Works Communications file
BCO	Bitstream Outline font description file
BCP	Borland C++ Makefile
BCW	Borland C++ 4.5 Environment settings file
BDB	Microsoft Works Dababase file
BDF	West Point Bridge Designer file
BDF	Egret Datafile
BDR	Microsoft Publisher Border
BEZ	Bitstream Outline font description
BF2	Bradford 2 Font
BFC	Windows 95 Briefcase Document
BFM	Font Metrics file (Unix/Mainframe)
BFX	BitFax graphic
BG	Microsoft Backgammon Game file
BGA	OS/2 Graphic array
BGI	Borland Graphics Interface Driver
BGL	Microsoft Flight Simulator Scenery file
BHF	pcAnywhere Host file
BI	Binary file
BIB	Bibliography file (ASCII)
BIB	TeX/BibTeX Literature Database
BIB	Database
BIF	GroupWise initialization file
BIF	Image Capture Board Binary Image black & white graphic
BIFF	XLITE 3D file
BIN	Binary file
BIO	OS/2 Bios file
BIT	X11 Bitmap
BK	Backup file (Generic)
BK	JetFax Faxbook file
BK$	Backup file (Generic)
BK!	WordPerfect for Windows Document backup
BK1	WordPerfect for Windows Timed backup file for document window 1
BK2	WordPerfect for Windows Timed backup file for document window 2
BK3	WordPerfect for Windows Timed backup file for document window 3
BK4	WordPerfect for Windows Timed backup file for document window 4
BK5	WordPerfect for Windows Timed backup file for document window 5
BK6	WordPerfect for Windows Timed backup file for document window 6
BK7	WordPerfect for Windows Timed backup file for document window 7
BK8	WordPerfect for Windows Timed backup file for document window 8
BK9	WordPerfect for Windows Timed backup file for document window 9
BKP	TurboVidion Dialog Designer Backup
BKS	IBM BookManager Read bookshelf file
BKS	Microsoft Works Spreadsheet Backup
BKW	FontEdit Fontset mirror image
BLD	BASIC Bloadable picture file
BLK	Alias Wavefront Image
BLK	WordPerfect for Windows Temporary file
BM	Windows system Bitmap
BMF	Corel Gallery file
BMK	Windows Help bookmark
BMP	Windows or OS/2 bitmap
BM1	Apogee BioMenace data
BNK	AdLib Instrument Bank file
BOO	Microsoft Booasm.arc Compressed archive
BOOK	Adobe FrameMaker Book
BOX	Lotus Notes file
BPC	Business Plan Toolkit Chart
BPL	Borland Delphi 4 packed library
BPS	Microsoft Works Document
BPT	CorelDraw Bitmap fills file
BPX	Truevision Targa Bitmap
BQY	BrioQuery file
BR	Bridge Script
BRD	Eagle Layout file
BRK	Brooktrout Fax-Mail file
BRX	A file for browsing an index of multimedia options
BRZ	DbBRZ file for very large Db backup or restore
BSA	BSARC Compressed archive
BSC	Apple II Compressed archive
BSC	Fortran Pwbrmake Object
BSC	MS Developer Studio (MSDev) browser information
BSP	Quake map file
BS1	Apogee Blake Stone data file
BS_	Microsoft Bookshelf Find Menu shell extension
BTM	Batch file used by Norton Utilities
BUD	Backup disk for Quicken
BUG	Bugs and Problems file
BUN	CakeWalk Audio Bundle (a MIDI program)
BUP	Backup
BUT	Buttons! Button definition
BUY	Movie data file
BV1	WordPerfect for Windows Overflow file below insert point in document 1
BV2	WordPerfect for Windows Overflow file below insert point in document 2
BV3	WordPerfect for Windows Overflow file below insert point in document 3
BV4	WordPerfect for Windows Overflow file below insert point in document 4
BV5	WordPerfect for Windows Overflow file below insert point in document 5
BV6	WordPerfect for Windows Overflow file below insert point in document 6
BV7	Wordperfect for Windows Overflow file below insert point in document 7
BV8	WordPerfect for Windows Overflow file below insert point in document 8
BV9	WordPerfect for Windows Overflow file below insert point in document 9
BW	SGI Black and White image file
BW	Silicon Graphics Raw red,green and blue bytes file
BWB	Visual Baler Spreadsheet application
BWR	Kermit Beware buglist
BWV	Business Wave file
BYU	BYU Movie
B1N	1st Reader Mono and color binary screen image
B30	ABC Ventura publisher printer font
B4	Helix Nuts and Bolts file
B8	Raw graphic file (Piclab Plane II)
B_W	Atari/Macintosh black and white graphic
B&W	Atari/Macintosh black and white graphic
B&W	1st Reader Mono binary screen image

C
 

C	C code
CA	Telnet Server Initial cache data file
CAB	Microsoft cabinet file (program files compressed for software distribution)
CAC	dBase IV Executable file
CAD	Softdesk Drafix Cad file
CAL	CALS Compressed Bitmap
CAL	SuperCalc 4/5 Spreadsheet
CAL	Calendar schedule data file
CAM	Casio camera file
CAN	Navigator Fax
CAP	Ventura Publisher Caption
CAP	Compressed music file
CAP	Telix Session Capture file
CAS	Comma-delimited ASCII file
CAT	Quicken IntelliCharge categorization file
CAT	dBase Catalogue file
CB	Microsoft clean boot file
CBC	CubiCalc Fuzzy Logic System file
CBI	Column binary file (used in IBM mainframe systems)
CBL	Cobol Source code
CBM	XLib Compiled Bitmap
CBT	Generic Computer based training file
CC	Visual dBASE custom class file
CC	C++ Source code
CCA	cc:mail file
CCB	Visual Basic Animated Button configuration file
CCC	Curtain Call Native bitmap graphic
CCF	Multimedia Viewer configuration file used in OS/2
CCF	Symphony Communications Configuration file
CCH	Corel Chart
CCL	Intalk Communication Command Language
CCM	Lotus CC:Mail "box" file (for example, INBOX.CCM)
CCO	CyberChat data file
CCO	XBTX Graphics
CCT	Macromedia Director Shockwave cast file
CDA	CD Audio Track
CDB	Clipboard file
CDB	CardScan Database
CDB	TCU Turbo C Utilities Main database
CDF	Netcdf Graphic file
CDF	Microsoft Channel Definition Format
CDI	Phillips Compact Disk Interactive file
CDK	Atari Calamus Document
CDM	Visual dBASE custom data module
CDR	Corel Draw Vector drawing file
CDR	Raw Audio-CD data file
CDT	Corel Draw template
CDT	CorelDraw Data file
CDX	Corel Draw compressed drawing
CDX	Microsoft's Visual FoxPro index
CE	The FarSide Computer Calendar Main CE file
CEG	Tempra Show Bitmap graphic
CEL	CIMFast Event Language file
CEL	AutoDesk Animator Cel Image
CER	Certificate file (MIME x-x509-ca-cert)
CF	Imake Configurtion file
CFB	Comptons Multimedia file
CFG	Configuration file
CFL	CorelFLOW Chart
CFM	ColdFusion template
CFM	Visual dBASE Windows customer form
CFM	Corel FontMaster file
CFN	Atari Calamus Font data file
CFO	TCU Turbo C Utilities C form object
CFP	The Complete Fax Portable fax file
CGA	Ventura Publisher Display font file
CGI	Common gateway interface script
CGM	Computer Graphic Metafile
CH	OS/2 configuration file
CH	Clipper 5 Header
CH3	Harvard Graphics 3.0 Chart
CH4	Charisma 4.0 Presentation
CHD	FontChameleon Font descriptor
CHF	pcAnywhere remote control file
CHI	ChiWriter Document
CHK	File fragments saved by Windows Disk Defragmenter or ScanDisk
CHK	WordPerfect for Windows Temporary file
CHL	Configuration History Log
CHM	Compiled HTML file
CHN	Ethnograph Data file
CHP	Ventura Publisher Chapter file
CHR	Character Sets (Font file)
CHT	ChartViewer file
CHT	Harvard Graphics vector file
CHT	ChartMaster dBase Interface file
CIF	CalTech Intermediate Graphic
CIF	Easy CD Creator image
CIF	pcAnywhere caller file
CIL	Clip Gallery download package file
CIM	Sim City 2000 file
CIN	OS/2 change control file that tracks changes to an INI file
CIX	TCU Turbo C Utilities Database Index
CKB	Borland C++ Keyboard mapping file
CK1	iD/Apogee Commander Keen 1 data
CK2	iD/Apogee Commander Keen 2 data
CK3	iD/Apogee Commander Keen 3 data
CK4	iD/Apogee Commander Keen 4 data
CK5	iD/Apogee Commander Keen 5 data
CK6	iD/Apogee Commander Keen 6 data
CL	Generic LISP Source code
CLASS	Java class
CLG	Disk Catalog database
CLL	Cricket Software Clicker File
CLO	Cloe Image
CLP	Windows Clipboard
CLP	Quattro Pro Clip art
CLP	Clipper 5 Compiler Script
CLR	1st Reader Binary color screen image
CLR	PhotStyler Color defintion
CLS	Visual Basic Class Module
CLS	C++ Class Definition
CM	Craftman Data
CMD	Command file for Windows NT (similar to a DOS .BAT file), OS/2
CMD	DOS CP/M command file
CMD	dBase-II program file
CMD	1st Reader External Command Menu
CMF	Corel Metafile
CFM	Creative FM-Music
CMG	Chessmaster saved game
CMK	Card Shop Plus file
CMM	CEnvi Batch file
CMP	JPEG Bitmap
CMP	Address document
CMP	CorelDRAW 4.0 Postscript Printer Header
CMP	Route 66 Address Document
CMP	Microsoft Word for DOS User dictionary
CMR	MediaPlayer Movie
CMV	Corel Move animation
CMX	Corel Presentation Exchange image
CMYK	Raw cyan, magenta, yellow, and black bytes file
CNC	CNC General Program data
CNF	Configuration file used by Telnet, Windows, and other applications with varying internal formats
CNM	Windows application menu options and setup file
CNQ	Compuworks Design Shop file
CNT	Windows (or other) system content files for the help index and other purposes
CNV	Word for Windows Data conversion support file
CNV	WordPerfect for Windows Temporary file
COB	trueSpace 2 object
COB	COBOL Source code
COD	Microsoft C compiler output as displayable machine language/assembler with original C as comments
COD	FORTRAN Compiled code
COD	dBase Application Generator Template source file
COD	Video Text file
COL	AutoDesk Animator Color Palette
COL	Microsoft Multiplan Spreadsheet
COM	Command file (program)
CON	Simdir Configuration file
CP8	CP8 256 Gray Scale image
CPD	Corel PrintOffice file (drawing)
CPD	Fax Cover document
CPD	Complaints Desk Script
CPE	Fax Cover document
CPF	The Complete Fax (Fax file)
CPI	Microsoft MS-DOS code page information
CPI	ColorLab Processed Image bitmap
CPJ	CeQuadrant CD Project
CPL	Control Panel Module
CPL	Compel Presentation
CPL	Corel color palette
CPO	Corel Print House file
CPP	C++ Source code
CPP	CA-Cricket Presents presentation
CPR	Corel Presents presentation
CPS	Central Point PC Tools Backup
CPS	Coloured postscript
CPT	Corel Photo-Paint image
CPT	Macintosh Compressed Archive
CPT	dBase Encrypted Memo
CPT	CA-Cricket Presents Template
CPX	Corel Presentation Exchange compressed drawing
CPZ	COMPOZ Music Text
CRD	Microsoft Windows 3.x Cardfile
CRF	Zortech C++ cross-reference
CRP	Corel Presents run-time presentation
CRP	Visual dBASE custom report
CRP	dBase IV Encrypted database
CRS	WordPerfect 5.1 for Windows File Conversion resource
CRT	Certificate file
CRT	Oracle Terminal settings information
CRU	CRUSH Compressed archive
CSA	Comma deliminated text
CSC	Corel script
CSG	Statistica/w Graph file
CSM	Borland C++ 4.5 Precompiled header
CSP	PC Emcee On-Screen image
CSS	Stats+ Datafile
CSS	Statistica/w Datasheet
CSS	Cascading Style Sheet (MIME)
CST	Macromedia Director "Cast" (resource) file
CSV	Comma-separated values file
CSV	CompuShow Adjusted EGA/VGA Palette
CT	Scitex CT bitmap
CT	A graphic file associated with the Paint Shop Pro Graphic Editor
CTC	PC Installer Control
CTF	Symphony Character code translation
CTL	Used in general for files containing control information. FAXWorks uses it to keep information about each fax sent and received.
CTL	dBase IV Control
CTX	Visual Basic User control binary file
CTX	Pretty Good Privacy (PGP) Ciphertext file
CTX	Microsoft Online Course Text
CUE	Microsoft Cue Cards data
CUR	Windows Cursor
CURSOR	Sun Microsystems Cursor
CUT	Dr Halo Bitmap
CV	Corel Versions archive
CV	Microsoft CodeView information screen
CVG	Image
CVS	Canvas drawing file
CWK	Claris Works data
CWS	Claris Works template
CXT	Macromedia Director protected (not editable) "Cast" (resource) file
CXX	C++ source code
C--	Sphinx C-- Source code
C00	Ventura Publisher Print file
C01	Typhoon wave
C86	Computer Innovation (C86) Source code

D
 

DAO	Windows Registry Backup
DAT	Data file
DAT	WordPerfect Merge Data
DAT	Extension used for some MPEG files
DB	Borderland's Paradox 7 table database
DBC	Microsoft's Visual FoxPro database container file
DBF	A dBASE file, a format originated by Ashton-Tate, but understood by Act!, Clipper,FoxPro, Arago, Wordtech, xBase, and similar database or database-related products.
DBF	Enable database (can be opened with Excel 97)
DBF	Oracle 8.1.x tablespace file
DBK	dBase Database Backup
DBQ	Paradox Memo
DBT	dBase Text Memo
DBW	Microsoft Windows 9.x Database file (DataBoss)
DBX	DataBeam image
DBX	Microsoft's Visual Foxpro Table file
DCA	Document Content Architecture Text file (IBM DisplayWrite)
DCA	Visual Basic Active designer cache
DCF	Disk Image file
DCIM	Digital Imaging and Communications in Medicine (image and data)
DCM	DCM module
DCP	Data CodePage (OS/2)
DCR	Shockwave file
DCS	Desktop Color Separation file
DCS	Bitmap Graphics (Quark XPress)
DCS	Datafile (ACT! Activity file)
DCT	Microsoft's Visual FoxPro database container file
DCT	Database Dictionary file (Clarion Database Developer)
DCT	Database SpellCheck Dictionary (Harvard Graphics 3.0-Symphony)
DCU	Delphi compiled unit
DCX	Microsoft's Visual FoxPro database container file
DCX	Fax image (based on PCX)
DCX	Macro file
DCX	Bitmap Graphics file (Multipage PCX)
DC5	DataCAD Drawing
DD	Compressed Archive (Macintosh DISKDOUBLER)
DDB	Bitmap Graphics file
DDF	Btrieve or Xtrieve Data Definition File, which contains metadata describing a Btrieve or Xtrieve file
DDI	Image File (DISKDUPE)
DDIF	Digital Equipment or Compaq file. Used for storing images and their word processing documents
DDP	Device Driver Profile (OS/2)
DEB	Debug Script (DOS Debug)
DEF	SmartWare II data
DEF	C++ definition file
DEF	Assembly Header file (Geoworks)
DEFI	Oracle 7 de-install script
DEM	Graphics file (VistaPro)
DEM	A file with USGS standards for Digital Elevation Models
DEP	Visual Basic Setup Wizard Dependency file
DER	Certificate file
DEV	Device Driver
DEWF	Macintosh SoundCap/SoundEdit recorded instrument file
DFD	Data Flow Diagram Graphic (Prosa)
DFI	Outline Font description (Digifont)
DFL	Default Program Settings (Signature)
DFM	Data Flow Diagram model (Prosa)
DFS	Sound File (Delight)
DFV	Printing Form value (Microsoft Word)
DGN	Microstation95 CAD drawing
DGS	Diagnostics Report
DH	Dependency Information file (Geoworks)
DHP	Graphic file (Dr. Halo II-III PIC Format)
DHT	Datafile (Gauss)
DIA	Diagraph Graphics file (Computer Support Corporation)
DIB	Device-independent bitmap
DIC	Dictionary file
DIC	Dictionary file (Lotus Notes, Domino)
DIF	Data Interchange Format spreadsheet
DIF	Database file (VisiCalc)
DIF	Data Interchange Output file
DIF	Text file (Output from Data Interchange Format)
DIG	Digilink file
DIG	Sound Designer I audio
DIP	Graphics file
DIR	Macromedia Director file
DIR	Dialing Directory (ProComm Plus)
DIR	Directory (VAX) (DEC)
DIR	Movie (MacroMind Director 4.x)
DIS	Ray Tracer file
DIS	Distribution file (VAX Mail)
DIS	Thesaurus file (CorelDraw)
DIZ	Description file (Description in ZIP)
DKB	Graphics file (Ray Traced DKBTrace)
DL	Image
DLD	Datafile (Lotus 1-2-3)
DLG	C++ Dialogue Script
DLL	Dynamic-link library file
DLL	Export/Import Filter (CorelDraw)
DLS	Downloadable sound
DLS	Setup file (Norton DiskLock)
DMD	Visual dBASE data module
DMF	X-Trakker music module (MOD)
DMO	Demo file (Derive)
DMP	Dump file (Screen or Memory)
DMS	Compressed Archive (Amiga DISKMASHER)
DOB	Visual Basic User document
DOC	FrameMaker or FrameBuilder document
DOC	WordStar document
DOC	WordPerfect document
DOC	Microsoft Word document
DOC	DisplayWrite document
DOG	Screen Saver file (Laughing Dog Screen Saver)
DOH	Dependency Information file (Geoworks)
DOS	External Command file (1st Reader)
DOS	Network Driver file (PKT_DIS.dos)
DOS	Text file (DOS)
DOT	Word Document Template (Microsoft Word for Windows)
DOT	Line-Type definition (CorelDraw)
DOX	User document binary form (Visual Basic)
DOX	Text file (MultiMate 4.x)
DOZ	Description out of Zip (VENDINFO)
DP	Calendar file (Daily Planner)
DP	Datafile (DataPhile)
DPL	Borland Delphi 3 packed library
DPR	Project header (Borland C++)
DRAW	Acorn's object-based vector image
DRS	Display Resource file (Microsoft WordPerfect for Windows)
DRV	Driver
DRV	Device Driver (Required to make a device function)
DRW	Vector graphics (Micrografx)
DRW	Lotus Freelance Image
DRW	Pro/E drawing
DS4	Micrografx Designer Image
DR9	Directory file
DS4	Vector Graphics (Micrografx)
DSC	Discard file (Oracle)
DSD	Database file (DataShaper)
DSF	Micrografx Designer v7.x file
DSG	DooM saved game
DSK	Project Desktop file (Borland C++/Turbo Pascal)
DSM	Dynamic Studio music module (MOD)
DSM	Digital Sound Module (DSI)
DSN	ODBC Data source
DSN	Design (Object System Designer)
DSP	Microsoft Developer Studio project
DSP	Display parameters (Signature)
DSP	Graphics Display driver (Dr. Halo)
DSQ	Corel QUERY
DSR	Visual Basic Active designer file
DSR	Driver Resource (Microsoft WordPerfect for Windows)
DSS	Screensaver file (DCC)
DSS	Digital Sound file (Digital Soup))
DST	Embroidery machines graphic file
DSW	Desktop settings (Borland C++ 4.5)
DSW	Microsoft Developer Studio workspace file
DSX	Visual Basic Active designer binary file
DT_	Data file fork (Macintosh)
DTA	World Bank's STARS data
DTA	Datafile (Turbo C++)
DTD	SGML Document Type Definition (DTD) file
DTED	Digital terrain elevation data (geographic data format)
DTF	Database file (PFS-Questions & Answers)
DTF	Symantec Q&A relational database
DTM	Module file (DigiTrakker)
DTP	Text Document (Timeworks Publisher 3.x)
DPT	Publication file (Publish-It!)
DUN	Microsoft Dial-up Networking Export file
DUP	Duplicate Backup
DV	Digital video (MIME)
DVC	Datafile (Lotus 1-2-3)
DVI	Binary file (TeX)
DVI	Device Independent Document (TeX)
DVP	Desqview Program information (DESQview)
DVP	Device parameter file (AutoCAD)
DW2	Drawing file (DesignCAD for Windows)
DWC	Compressed Archive (DWC)
DWD	DiamondWare digitized file
DWF	Vector graphic (Autodesk)
DWG	Autocad Drawing
DWG	AutoCAD drawing, or older Generic CADD drawing file
DX	Digital Electric Corporation (DEC) Data exchange file
DXF	Drawing Interchange (eXchange) format,a text representation of the binary DWG format
DXF	Drawing Interchange Format (AutoCAD)
DXF	Data Exchange File
DXN	Fax document (Fujitsu dexNet)
DXR	Macromedia Director protected (not editable) movie file
DYN	Datafile (Lotus 1-2-3)
D64	Commodore 64 emulator disk image

E
 

EBJ	Error Checking Object file (Geoworks)
ED5	EDMICS image
ED6	EDMICS image
EDA	Ensoniq ASR disk image
EDB	ROOTS3 Geneological data
EDE	Ensoniq EPS disk image
EDD	Element Definition document (FrameMaker+SGML documents)
EDK	Ensoniq KT disk image
EDQ	Ensoniq SQ1/SQ2/KS32 disk image
EDS	Ensoniq SQ80 disk image
EDT	Default settings (VAX Edt editor)
EDV	Ensoniq VFX-SD disk image
EEB	Button Bar for Equation editor (Microsoft WordPerfect for Windows)
EFA	Ensoniq ASR file
EFE	Ensoniq EPS file
EFK	Ensoniq KT file
EFQ	Ensoniq SQ1/SQ2/KS32 file
EFS	Ensoniq SQ80 file
EFT	High Resolution Screen Font (ChiWriter)
EFV	Ensoniq VFX-SD file
EFX	Fax Document (Everex EFax)
EGA	EGA Display font (Ventura Publisher)
EL	Lisp Source code (eMacs)
ELC	eMac Lisp Source code (byte-compiled)
ELT	Event List Text file (Prosa)
EMB	Embedded bank File (Everest)
EMD	ABT Extended MoDule
EMF	Enhanced Windows Metafile
EML	Microsoft Outlook Express mail message (MIME RFC 822)
EMS	Enhanced Menu System Configuration file (PC Tools)
EMU	Terminal Emulation Data file (BITCOM)
ENC	Music file (Encore)
ENC	Video file
ENC	Encoded file (UUENCODEd File, Lotus 1-2-3)
END	Arrow-Head Definition Table (CorelDraw)
ENFF	Neutral Format
ENG	Dictionary Engine file (Sprint)
ENG	Chart Graphics file (EnerGraphics)
ENV	Enveloper Macro (WOPR)
ENV	Environment file (Microsoft WordPerfect for Windows)
EPD	Publication file (Express Publisher)
EPHTML	Enhanced Perl-parsed HTML
EPI	Document file (Express Publisher)
EPS	Encapsulated Postscript Vector graphics (Adobe Illustrator)
EPS	Printer font (Epson, Xerox, Ventura Publisher)
EPS2	Adobe Level II Encapsulated Postscript
EPS	Encapsulated PostScript image file
EPSF	Encapsulated PostScript
EPSI	Adobe Encapsulated Postscript Interchange
EQN	Equation file (Microsoft WordPerfect for Windows)
ER1	ERWin file
ERD	Entity Relationship Diagram graphic file (Prosa)
ERM	Entity Relationship Diagram Model file (Prosa)
ERR	Stores the error messages that result when the RoboHELP Help Compiler attempts to compile the source files of a Help system
ERX	ERWin file
ESH	Extended Shell Batch file (DOS)
ESPS	ESPS audio file
ETH	Document file (Ethnograph 3.x)
ETX	Structure Enhanced text (SetText)
EUI	Ensoniq ESP family compacted disk image
EVT	Event Log (Generic)
EVY	Document (Microsoft Wordperfect for Windows Envoy)
EWD	Text Document (Express Publisher for Windows)
EWL	Microsoft Encarta document
EX3	Device Driver file (Harvard Graphics 3.x)
EXC	Microsoft Word Exclusion Dictionary file
EXC	Source Code file (Rexx VM/CMS)
EXC	Exclude file for Optimize (do not process, QEMM)
EXE	Executable file (program)

F
 

F	FORTRAN file
F	Compressed file archive (FREEZE)
FAC	Face graphic
FAQ	Frequently Asked Questions document
FAR	Music module (MOD) (Farandole Composer)
FAV	Navigation bar (Microsoft Outlook)
FAX	FAX Type image
FBK	Backup (Navison Financials)
FC	Spell Check dictionary file (Harvard Graphics)
FCD	Virtual CD-ROM file
FCM	Binary file patch (Forward Compression)
FD	Declaration file (FORTRAN)
FD	Field offsets for compiler (DataFlex)
FDB	Database (Navison Financials)
FDF	Forms Document (Adobe Acrobat)
FDW	Document form (F3 Design and Mapping)
FEB	Button Bar for Figure Editor (Microsoft WordPerfect for Windows)
FEM	CADRE Finite Element Mesh
FF	Outline Font description (AGFA CompuGraphics)
FFA	MS find fast file
FFF	Fax document (defFax)
FFF	GUS PnP bank file
FFL	MS fast find file
FFO	MS fast find file
FFT	Final Form Text (part of IBM's DCA)
FFX	MS fast find file
FH3	Aldus Freehand 3 drawing (Vector graphic)
FH4	Aldus Freehand 4 drawing (Vector graphic)
FI	File Interface (FORTRAN)
FIF	Fractal Image
FIG	REND386/AVRIL file
FIL	File template (Application Generator)
FIL	File List Object (dBase Application Generator)
FIL	Overlay (Microsoft WordPerfect for Windows)
FIN	Print formatted text (Perfect Writer)
FIT	Graphic (FITS)
FIT	File index table (Microsoft Windows NT)
FITS	CCD camera image
FITS	Flexible Image Transport System file
FIX	Patch file (Generic)
FKY	Macro (Microsoft FoxPro)
FLA	Movie (Macromedia Flash)
FLB	Format library (Papyrus)
FLC	FLIC animation (AutoDesk)
FLD	File folder (Charisma)
FLF	Delived form (Corel Paradox)
FLF	License (Navison Financials)
FLI	FLIC animation (AutoDesk)
FLI	Font library (EmTeX)
FLF	Driver (OS/2)
FLM	Film Roll (AutoCAD)
FLO	FlowCharter file (MicroGrafx)
FLS	Filelist document (Farrukh Imposition Publisher)
FLT	Graphics filter (Microsoft)
FLT	Filter (Corel)
FLT	Filter (Micrografx Picture Publisher)
FLT	Graphics filter support file (Asymetrix ToolBook)
FLT	Music module (MOD) (StarTrekker)
FLT	Open Flight file (MulitGen)
FLX	Compiled binary file (DataFlex)
FM	Spreadsheet (FileMaker Pro)
FM	FrameMaker Document (Adobe)
FM1	Spreadsheet (Lotus 1-2-3, version 2.x)
FM3	Device driver (Harvard Graphics, version 3.0)
FM3	Spreadsheet (Lotus 1-2-3, version 3.x)
FMB	Binary source code for form, (Oracle, v4.x and later)
FMB	File Manager button bar (Microsoft WordPerfect for Windows)
FMF	Font or Icon (IBM LinkWay)
FMK	MakeFile (FORTRAN PowerStation)
FML	Mirror list (Oracle)
FMO	Compiled format (dBase IV)
FMP	Document file (FileMaker Pro)
FMT	Text format for form file (Oracle, v4.x and later)
FMT	Print file (Microsoft Schedule+)
FMT	Style sheet (Sprint)
FMX	Executable form, (Oracle,v4.x and later)
FN3	Font (Harvard Graphics)
FND	Saved Search (Find applet) (Microsoft Explorer)
FNG	Font group (Font Navigator)
FNK	Module (FunkTracker)
FNT	Font (Generic)
FNX	Inactive font (Exact)
FO1	Font (Borland Turbo C)
FO2	Font (Borland Turbo C)
FOG	Fontographer font
FOL	Saved message folder (1st Reader)
FON	Font (Generic)
FON	Call log (Procomm Plus)
FON	System font (Generic)
FON	Dialing directory (Telix)
FOR	FORTRAN source code
FOR	Form (WindowBase)
FOT	Font-related file (Generic)
FOT	Installed TrueType font (Microsoft Windows Font Installer)
FP	Configuration file (FoxPro)
FP	FileMaker Pro file
FP1	"Flying Pigs" screensaver datafile (Microsoft Windows 9.x)
FP3	FileMaker Pro v.3 & 4 document file
FP5	Document file (FileMaker Pro v.5)
FPC	Catalog file (FoxPro)
FPT	FileMaker Pro file
FPT	Memo fields (Microsoft FoxPro)
FPW	Floorplan drawing (FloorPlan Plus for Windows)
FPX	Bitmap (FlashPix)
FR3	Renamed dBaseIII+ form (dBase IV)
FRF	Font (FontMonger)
FRG	Uncompiled report (dBase IV)
FRM	Form (Generic)
FRM	Document (FrameMaker or FrameBuilder)
FRM	Executable file (Oracle,v3.0 and earlier)
FRM	Form (Visual Basic)
FRM	Merge form (Microsoft WordPerfect for Windows)
FRM	Symbol Report (DataCAD)
FRO	Compiled report (dBase IV)
FRP	Form (PerForm PRO Plus)
FRS	Screen Font Resource (Microsoft Wordperfect for Windows)
FRT	Report menu (FoxPro)
FRX	Form stash file (Visual Basic)
FRX	Report (Microsoft FoxPro)
FSF	fPrint Audit Tool
FSL	Paradox 7 form (Borderland)
FSL	Form (Paradox for Windows)
FSL	Saved form (Corel Paradox)
FSM	Sample file (Farandoyle)
FST	Linkable program (dBFast)
FSX	Data (Lotus 1-2-3)
FT	Full text index (Lotus Notes)
FTB	Index file (Roots3)
FTG	Help system full-text search group file (Microsoft Windows)
FTM	Font (MicroGrafx)
FTP	File transfer protocol (Internet Generic)
FTS	Help system full-text search index (Windows)
FTW	Document file (Family Tree Maker)
FW	Database (Framework II)
FW2	Database (Framework II)
FW3	Database (Framework III)
FW4	Database (Framework IV)
FWB	Data file backup for file splitting configuration (FileWrangler)
FWS	Data file for file splitting configuration (FileWrangler)
FX	On-Line guide (FastLynx)
FXD	Phonebook (FAXit)
FXP	Compiled source code (FoxPro)
FXS	Fax Transmit graphic (WinFax)
FZB	Bank dump file (Casio FZ-1)
FZF	Full dump file (Casio FZ-1)
FZV	Voice dump file (Casio FZ-1)
F01	Fax document (Perfect Fax)
F06	Dos screen text font (height= 6 pixels)
F07	Dos screen text font (height= 7 pixels)
F08	Dos screen text font (height= 8 pixels)
F09	Dos screen text font (height= 9 pixels)
F10	Dos screen text font (height= 10 pixels)
F11	Dos screen text font (height= 11 pixels)
F12	Dos screen text font (height= 12 pixels)
F13	Dos screen text font (height= 13 pixels)
F14	Dos screen text font (height= 14 pixels)
F15	Dos screen text font (height= 15 pixels)
F16	Dos screen text font (height= 16 pixels)
F2R	Linear music module (Farandole)
F3R	Blocked music module (Farandole)
F77	Source code file (FORTRAN 77)
F90	FORTRAN file
F96	Fax document (Frecom FAX96)

G
 

G	Data chart (APPLAUSE)
GAL	Album (Corel Multimedia Manager)
GAM	Fax document (GammaFax)
GBL	Global definitions (VAXTPU Editor)
GC1	Lisp source code (Golden Common Lisp 1.1)
GC3	Lisp source code (Golden Common Lisp 1.1)
GCD	Generic (TM) CADD drawing (later versions)
GCP	Image processing file (Ground Control Point)
GDB	Database file (InterBase)
GDF	Dictionary file (GEOS)
GDM	Bells, whistles, and sound boards module
GED	Genealogical data (GEDCOM)
GED	Graphic Environment Document (drawing)
GED	Graphics editor native format (Arts & Letters)
GED	Graphics editor file (EnerGraphics)
GEM	Metafile (GEM)
GEM	Vector graphics (Ventura Publisher)
GEN	Generated text (Ventura Publisher)
GEN	Compiled template (dBase Application Generator)
GEO	Geode (Geoworks)
GetRight	Unfinished-Download (GetRight)
GFB	Compressed gif image (GIFBLAST)
GFC	Patton&Patton Flowcharting 4 flowchart
GFI	Graphics Link presentation (Genigraphics)
GFT	Font (NeoPaint)
GFX	Genigraphics Graphics Link presentation
GIB	Chart (Graph-in-the-Box)
GID	Windows 95 global index (containing help status)
GIF	Bitmap (CompuServe)
GIM	Graphics Link presentation (Genigraphics)
GIW	Presentation (Graph-in-the-Box for Windows)
GIX	Graphics Link presentation (Genigraphics)
GKH	Ensoniq EPS family disk image
GKS	GripKey document (Gravis)
GL	Animation file (GRASP graphical System for Presentation)
GLM	Datafile (Glim)
GLS	Datafile (Across)
GLY	Glossary (Microsoft Word)
GMF	CGM Graphics (APPLAUSE)
GMP	Tile map (Geomorph) (SPX)
GMR	Graphical monitor record (Schlafhorst Automation)
GNA	Graphics Link presentation (Genigraphics)
GNO	Genealogy document file (Genopro)
GNT	Generated executable code (Micro Focus)
GNX	Graphics Link presentation (Genigraphics)
GOC	Goc sorce code (Geoworks)
GOH	Goc header (Geoworks)
GP	Geode parameter file (Geoworks Glue)
GPH	Graph (Lotus 1-2-3/G)
GPK	Program package (Omnigo)
GR2	Screen driver (Microsoft Windows 3.x)
GRA	Graph (Microsoft)
GRA	Datafile (SigmaPlot)
GRB	Shell Monitor (MS-DOS v5.0)
GRD	Image processing grid (CHIPS)
GRF	Grapher (Golden Software) graph
GRF	Graph (Charisma Graph Plus)
GRP	Program Manager Group (Microsoft)
GRP	Pictures group (PixBase)
GRY	Raw graphic (GREY)
GS1	Presentation (GraphShow)
GSD	Vector graphic (Professional Draw)
GSM	Audio stream Raw GSM (6.10 audio stream)
GSM	Audio stream Raw 'byte aligned (GSM 6.10 audio stream)
GSM	GSM w.o. header/VoiceGuide/RapidComm file (US Robotics voice modems)
GSM	GSM w. header/QuickLink file (US Robotics voice modems)
GSP	Sketch pad file (GeoMeter Sketch Pad)
GSW	Worksheet (GraphShow)
GTK	Music module (Graoumftracker) (old) (MOD)
GT2	Music module (Graoumftracker) (new) (MOD)
GUP	Data (PopMail)
GWP	Greetings WorkShop file
GWX	Graphics Link presentation (Genigraphics)
GWZ	Graphics Link presentation (Genigraphics)
GXL	Graphics library (Genus)
GZ	Compressed file (Unix gzip)
G721	Raw CCITT G.721 $bit ADPCM data
G723	Raw CCITT G.723 3 or 5bit ADPCM data
G8	Raw Graphics (one byte per pixel) Plane III (PicLab)

H
 

H	Program header (C)
HA	Compressed archive (HA)
HAM	Driver file (Novell Netware)
HAP	Compressed archive (HA)
HBK	Handbook (MathCad)
HCM	Configuration file (IBM HCM)
HCOM	Sound Tools file (HCOM)
HCR	Production configuration file (IBM HCD/HCM)
HDF	National Center for Supercomputing Applications (NCSA) Geospatial Hierarchical Data
HDF	Help file (Help development kit)
HDL	Alternate download listing (ProComm Plus)
HDR	Database header (Pc-File+)
HDR	Datafile (Egret)
HDR	Message header text (ProComm Plus)
HDR	Message header text (1st Reader)
HDW	Vector graphics (Harvard Draw)
HDX	Help index (AutoCAD)
HDX	Help index (Zortech C++)
HED	Document (HighEdit)
HEL	Hellbender saved game (Microsoft)
HEX	Macintosh BinHex 2.0 file
HFI	HP font info (GEM)
HGL	Drawing file (HP Graphics Language)
HH	Help system map (Generic)
HH	Header file (C++)
HHH	Precompiled header (Power C)
HHP	Help information for remote users (ProComm Plus)
HIT	Audio file (HitPlayer)
HLB	Help library (VAX)
HLP	Help file (Generic)
HLP	Windows Help file (DataCAD)
HMM	Alternate mail read option menu (ProComm Plus)
HNC	Program files (CNC)
HOG	Lucas Arts Dark Forces WAD file
HOG	Mission file (Descent 1-2)
HOG	Main data package file (Descent3)
HOT	Document file (HotSend)
HP8	Ascii text Roman8 character set (NewWave Write)
HPC	Font language file (Hewlett-Packard)
HPF	HP LaserJet font (Adobe Pagemaker)
HPF	Partial download file (HotLine)
HPG	HPGL Plotter vector graphics (AutoCAD)
HPG	HPGL Plotter vector graphics (Harvard Graphics)
HPI	Font information (GEM)
HPJ	Help Project file (Visual Basic)
HPK	Compressed archive (HPACK)
HPM	Emm text (HP NewWave)
HPM	Alternative menu for privileged users (ProComm Plus)
HPP	Program header (C++)
HPP	Header file (Zortech C++)
HQX	BinHex (Macintosh 4.0)
HRF	Rastor graphic (Hitachi)
HRM	Alternate menu for limited users (ProComm Plus)
HS2	Monochrome image (Postering)
HSI	Graphic (Handmade Software, Inc.)
HST	History file (Generic)
HST	History file (ProComm Plus)
HT	HyperTerminal file