Alphabetical list of filename extensions (A–E)

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This alphabetical list of filename extensions contains standard extensions associated with computer files.

Symbols[edit]

Ext. Description Used by
###
Temporary file program-dependent format
#24
Printer data file for 24 pin matrix printer LocoScript
#IB
Printer data file LocoScript
#nn
Part of file image Long
#SC
Printer data file LocoScript
#ST
Standard mode printer definitions LocoScript
$$$
OS/2 archive file (i.e. archives.$$$, keys.$$$) OS/2
$$$
Temporary file
$?
ZX Spectrum file in HOBETA format
$00
Pipe file DOS
$DB
Temporary file dBASE IV
$ED
Editor temporary file MS C
$O1
Pipe file DOS
$VM
Virtual manager temporary file Windows 3.x
)2(
LHA archiver temporary file LHA
 ??$
Backup file P-CAD
 ??_
Microsoft packed file Expand
 ?DK
Disk image Loaddskf.exe
 ?UT
Nonpacked FTN mail (? - flavor) FidoNet
 !ut
Unfinished µTorrent download µTorrent
___
Adinf table Adinf
EX_
Compressed executable file Note: EX could be any first two characters in a file extension (e.g. BM_ for compressed bitmap (BMP), DL_ for compressed library, etc.) Files compressed using this method have been in use on Microsoft software CDs and floppies since around 1995.
 ?Q?
Squeeze CP/M and MS-DOS
~$~
Temporary file 1st Reader
~1~, ~2~, etc.
backup file (name is constructed with numbered backup option by appending ~, the incremented number, and another ~ after the original name) GNU coreutils (cp, install, ln, mv ), Emacs
~??
Old Backup files (.MNU to .~MN) Resource Workshop (Borland Delphi)
~H
Cardfile heap AZZ Cardfile
μ
Metrowerks Codewarrior project
Π
THINK C project

Numbers[edit]

Ext. Description Used by
0
Compressed harddisk data DoubleSpace
0B
Printer font with lineDraw extended character set PageMaker
001, 002, ...
Split parts of a single whole file FFSJ, HJSplit, JJSplit, split (Unix) (when using numeric suffixes)
1
Fax many
1
Roff/nroff/troff/groff source for manual page cawf2.zip
123
Spreadsheet Lotus 1-2-3 version 9 and version 97
15U
Printer font with PI font set PageMaker
16
SYSLINUX Splash Screen Graphic SYSLINUX, XnView
1ST
Usually README.1ST text file
1TX
1toX Logipole file
2GR
286 Grabber File Win
301
Fax Super FAX 2000 - Fax-Mail 96
386
Intel 80386 processor driver Windows 3.x
386
Windows virtual device driver Win
3DMF
QuickDraw 3D Metafile QuickDraw
3DS
3D Studio Graphics format 3D Studio
3DT
Database in which the meta-data of a 3D Topicscape is held 3D Topicscape
3DV
3-D wireframe graphics by Oscar Garcia 3dv wireframe viewer
3FX
Effect CorelChart
3GA
Mobile Phone Audio (Samsung)
Mobile Phone Video
3GR
386 Grabber File Win
3T4
Binary file converter to ASCII Util3
4DB
4D Structure File 4D
4DD
4D Data File 4D
4DIndy
4D Structure Index File 4D
4C$
Datafile 4Cast/2
4MD
Musical file
4SW
4DOS Swap File 4DOS
4TH
FORTH source code file ForthCMP - LMI Forth
555
16 bit per pixel image file format (5bit per component) Sierra Entertainment
602
Text (fairly simple format, plain text with binary control commands embedded within text lines and special formatting commands on dedicated lines) Text602 text processor by Software602
668
Music (the mixing is always at 12048 Hz)
669
Music (8 channels) The 669 Composer
6CM
Music (6 Channel Module) Triton FastTracker
75
75×75 dpi display font Ventura Publisher
7z
A compressed archive file format that supports several different data compression, encryption and pre-processing algorithms 7-Zip
8
A86 assembler source code file
85
85×85 dpi display font Ventura Publisher
8BF
Adobe Photoshop compatibile filters/plugins
890
ScanTitling subtitle files
8CM
Music (8 Channel Module) Triton FastTracker
8M
Printer font with Math 8 extended character set PageMaker
8U
Printer font with Roman 8 extended character set PageMaker
83p
Executable program for TI-83 Plus Graphing Calculator TI Connect
89p
Executable program for TI-89/89 Titanium Graphing Calculator TI Connect
8xp
Executable program for TI-83/84 Plus Graphing Calculator TI Connect
91
91×91 dpi display font Ventura Publisher
96
96×96 dpi display font Ventura Publisher

A[edit]

Ext. Description Used by
A
ADA source code file
A
Library Unix
A##
AlZip Compressed Files' pieces
A11
Graphics AIIM image file
A2W
World file for Alice programming language, version 3.1
A80
Assembler language source for 8080
AA, AB, ...
Split parts of a single whole file split (Unix)
AAC
Advanced Audio Coding, a standardized, lossy compression and encoding scheme for digital audio
AAF
AutoPatcher file
AAF
Advanced Authoring Format, an advanced media wrapper file for professional applications
AAS
Animation Play Script AAPlay
AB6
Datafile ABStat
AB8
Datafile ABStat
ABC
Alembic - 3D geometry / models Many Computer Graphics tools, see Alembic (Computer Graphics) for a list.
ABC
Document ABC FlowCharter 1.0
ABP
Data ABComp compressed
ABP
AVS Barcode Profile AVS Barcode Source
ABF
Adobe Binary Screen Font Adobe Systems Software
ABK
Automatic backup file CorelDRAW
ABM
Image PALS album file
ABM
Album file (various programs)
ABR
Adobe Brush file for PhotoShop PhotoShop
ABS
Abstracts (info file)
ABS
Data file Abscissa
AC
Project backup Audit Command Language (ACL)
ACA
Project Project Manager Workbench
ACB
Archive ACB
ACB
see ACMB
ACC
Program (DR-DOS - ViewMax) GEM / resident
ACCDA
Data Microsoft Access Database Wizard (Open XML)
ACCDB
Data Microsoft Access Database (Open XML)
ACCDE
Data Microsoft Access Database Wizard (Open XML)
ACCDT
Data Microsoft Access Database Template (Open XML)
ACCDU
Data Microsoft Access Database Wizard (Open XML)
ACE
Archive ACE
ACF
Adobe Custom Filter for PhotoShop PhotoShop
ACL
Project Audit Command Language (ACL)
ACL
AutoCorrect List Microsoft Office
ACM
Audio Compression Module add-on Win
ACMB
Graphics file
ACO
Adobe Color Palette Adobe
ACT
ACTOR source code file ACTOR
ACT
Animations Works Actor (Graphics cell) Animation Works
ACT
FoxDoc Action Diagrams FoxPro
ACT
Presentation Action!
AfterDark screensaver module AfterDark
AD2
ADPCM 2-bit compressed voice file ZFAX
AD3
ADPCM 3-bit compressed voice file ZFAX
ADA
Ada source code file
ADB
Ada Package Body
ADC
Bitmap graphics (16 colors) Scanstudio
ADC
Dictionary Lingvo
ADD
OS/2 adapter device driver
ADF
Amiga Disk File unADF, UAE, WinUAE etc...
ADG
Data ADG 3D Scene
ADI
Graphics file AutoCAD
ADI
Database Index File Advantage Database Server
ADICHT
LabChart data acquisition file ADInstruments
ADL
MCA adapter description library QEMM
ADM
After Dark support file AfterDark
ADM
ADEM file format ADEM
ADI
Database Memo File Advantage Database Server
ADN
Add-in Lotus 1-2-3
ADR
After Dark support file AfterDark
ADS
Ada Package Specification
ADT
WoW geographical map location file Blizzard Entertainment games (various)
ADT
Datafile for cardfile application HP NewWave
ADT
Abrechnungsdatentransfer, an xDT application Healthcare providers in Germany
ADT
Dictionary Lingvo
ADT
Fax AdTech
ADI
Database Table Advantage Database Server
ADV
GUS device driver Gf166.com
ADX
Document Archetype Designer
ADZ
Amiga Disk Zipped (See Amiga Disk File) GZip
AEP
After Effects Project File Adobe After Effects
AES
File encrypted using the Advanced Encryption Standard (AES) AES Crypt (Windows, Mac, Linux, Java) and Crypt4All (Android)
AF2
Flowchart ABC FlowCharter 2.0
AF3
Flowchart ABC FlowCharter 3.0
AFI
Truevision bitmap graphics
AFL
Font file (for Always) Lotus 1-2-3
AFM
Datafile for cardfile application HP NewWave
AFM
Type 1 font metric ASCII data for font installer ATM - many
AFP
Shape palette ABC FlowCharter
AFT
Template ABC FlowCharter 3.0
AFW
Workplace ABC FlowCharter 3.0
AGR
ArcView ASCII grid
AHK
AutoHotkey script file AutoHotkey
AI
Adobe Illustrator Artwork Adobe Illustrator
AIF
see AIFF
AIFC
Audio Interchange File Format with Compression
AIFF
Audio Interchange File Format Convert (c) Villena
AiM
Asm Text Mode Image File The Ultimate Draw
AIN
Archive AIN
AIN
Job schedule AutoIntern
AIO
APL programming language file transfer format file
AIR
Adobe AIR installation package The Adobe AIR runtime environment
AIS
Array of Intensity Samples graphics file Xerox
AIX
Datafile for cardfile application HP NewWave
AKM
"Akai Multitimbral" sample information file Akai S5000 and S6000 hardware samplers (MS-DOS-based) and compatible software samplers
AKP
"Akai Program" sample information file Akai S5000 and S6000 hardware samplers (MS-DOS-based) and compatible software samplers
ALC
Molecular coordinates Alchemy, RasMol
ALG
Activity Log ARCSOLO
ALE
Avid Log Exchange (used in film & video editing) Avid
ALL
Arts & Letters symbol and font files Arts & Letters
ALL
Filelist w/ all files FRQView
ALL
Format file for working pages Always
ALL
General printer information WordPerfect for Win
ALO
Almanac support file
ALT
Menu file WordPerfect Library
ALZ
AlZip Compressed Files
AMD
Maxum chromatograph offline database Siemens Maxum Chromatograph
AMF
Music (Advanced Module Format) DMP
AMG
Archive AMGC
AMG
System image file ACTOR
AML
AutomationML AutomationML Group
AMR
Audio format for mobile phones (Nokia, SonyEricsson)
AMS
Adobe Monitor Setup calibration file PhotoShop
AMS
Music format
ANI
Animation cursors for Win Win95 - WinNT
ANI
Animation IconAuthor
ANM
Animation Deluxe Paint Animator
ANIM
Trainz Animation specification file, for example a steam locomotive's connecting rod movements, or water movement on a river or lake motion. (Obsolescent) Trainz/Auran JET files
ANN
Help Annotations Windows 3.x
Ann
Multi volume ARJ archive ARJ
ANS
ANSI character graphics (animation) file ANSView
ANS
ASCII text ANSI character set NewWave Write
AOL
America On-line for Windows DLL Win
AOS
Add-On Software Nokia 9000
AP
Archive WHAP
AP
Datafile Datalex EntryPoint 90
APC
Printer driver Lotus 1-2-3
APD
Printer driver Lotus 1-2-3
APE
Monkey's Audio (Lossless) audio media players
APF
Printer driver Lotus 1-2-3
API
Adobe Printer Ink file for PhotoShop PhotoShop
API
Passed parameter file 1st Reader
API
Printer driver Lotus 1-2-3
APK
Android Application Android
APL
APL work space format file
APL
Support module used by Manugraphics APL products
APL
EV-Dos Application File
APM
Authorware Macintosh Authorware
APP
Add-in application file Symphony
APP
Application object file dBASE Application Generator
APP
Application FoxPro
APP
Application and Application Bundle Mac OS X
APP
Executable workflow / macro file Automator
APP
Executable application file DR-DOS - NeXTstep - Atari
APP
Generated application FoxPro
APR
Employee performance review Employee Appraiser
APW
Authorware Windows Authorware
APX
Appexpert database file Borland C++ 4.5
AQF
Analyzer Queries and Filters Actix
AR
Argon - for 3D Modeling Ashlar-Vellum
AR7
Archive AR7
ARC
Archive ARC - PKARC/PKXARC - PKPAS - PKUNPAK - QUARK
ARC
Archive SQUASH
ARC
Nintendo proprietary archive format Various Nintendo games
ARD
Map Holux - Alan
ARF
Automatic Response File
ARH
Archivers definitions file DN
ARI
Archive ARI
ARJ
Archive ARJ - ARJZ
ARK
ARC archive CP/M port of ARC file archiver
ARK
Archive QUARK
ARK
Managing your Money Archive File
ARR
Arrangement Atari Cubase
ART
Gerber artwork Cadence Allegro
ART
First Publisher, Designworks, Greenstreet Draw graphic file All GST/Greenstreet Draw products
ART
Graphics (scrapbook) Art Import
ART
Graphics format (Another Ray Tracer) PFS:1st publisher - Art Import
ARTX
file format Artisteer
ARTX
file format belightsoft Text Art
ARX
Archive ARX
ASC
ASCII text file
ASC
Transport armor file PGP
ASD
Autosave file Microsoft Word
ASD
Presentation Astound
ASD
Screen driver Lotus 1-2-3
ASD
Spectral Data Set ASD Inc. RS3 spectral acquisition program
ASE
Velvet Studio Sample AWAVE
ASE
ASCII Scene Export 3D Studio
ASF
Datafile (APL Shared File) STATGRAPHICS (APL*Plus/PC)
ASF
Screen font Lotus 1-2-3
ASF
Advanced Streaming Format (Compressed Windows audio/video) Microsoft Corporation
ASK
SYSGEN answer file RT-11
ASH
Assembly language header file TASM 3.0
ASI
ASIC language source ASIC
ASI
Assembler include file Turbo C - Borland C++
ASM
Assembler language source TASM, MASM, NASM, Yasm, FASM
ASMX
ASP.NET Web Service Microsoft Corporation
ASO
Assembler object (object-oriented) file Turbo Assembler
ASP
ASPECT source code file Procomm Plus
ASP
Association of Shareware Professionals OMBUDSMN.ASP notice
ASP
Active Server Pages of Microsoft.Net Microsoft Corporation
ASPX
ActiveX Server Pages of Microsoft.Net Microsoft Corporation
ASS
Amalgam Scene Specification Halo 2 Map Editor
ASS
Advanced SubStation Alpha (Subtitles)
AST
Adobe Color Separation table for PhotoShop PhotoShop
AST
Nintendo proprietary music streaming format Various Nintendo games
ASV
Autosave File MATLAB
ASW
Authorware Star Authorware
ASX
Advanced Stream Redirector file, redirects to an ASF file (see ASF) Microsoft Corporation
ASZ
Skin AltDesk
AT2
Auto template Aldus Persuasion 2.0
AT3
Atrac 3 Sound/music file All Sony devices and programs with the Atrac 3+ specification
ATM
Adobe Type Manager data/info
ATN
Adobe Photoshop action Adobe Photoshop
ATT
AT&T Group GCGW
ATTF
AramOS TypeAtor Text File AramOS TypeAtor 1.0 (Development State)
ATY
Produced when an association type is exported by 3D Topicscape 3D Topicscape
AU
Sun/NeXT/DEC Audio file AWAVE, GoldWave
AU
Sound (audio) file Sun Microsystems - Convert (c) Villena
AUD
Audio file AudioRack
AUP
Audacity project file Audacity
AUX
Auxiliary dictionary ChiWriter
AUX
Auxiliary references TeX/LaTeX
AUZ
Ableton Live File Authorization File for Ableton Live
AVA
Publication Avagio
AVB
AntiViral Toolkit Pro Bases
AVI
Audio Video Interleaved animation file Video for Windows
AVR
Audio Visual Research AWAVE
AVS
Audio Video Software AVS Video Editor (video editing software)
AVT
AVATAR-coding files A3E
AW
Text file HP AdvanceWrite
AW
Proprietry Nintendo wave format Various home console Nintendo games
AWA
Animations Works Accelerated Movie Animation Works
AWD
Microsoft Fax At Work Document Microsoft Fax At Work
AWK
AWK script/program awk, GNU Awk, mawk, nawk, MKS AWK, Awka (compiler)
AWM
Animations Works Movie (as .AVI) Animation Works
AWS
Data (APL Workspace) STATGRAPHICS (APL*Plus/PC)
Ax
Directshow filter file format
AXF
ARM Executable Image generated by the ARM tools
AXF
"lightweight geodatabase" [1] ESRI ArcPad
AXM
Axmedis object Axmedis Tools
AZD
Amazon Software Download Amazon Software Download
AZW
DRM enabled eBook All models of Amazon Kindle
AZW1
DRM enabled eBook with embedded fonts All models Amazon Kindle
AZW2
Program file All models of Amazon Kindle excluding Kindle 1
AZZ
Data file AZZ Cardfile

B[edit]

Ext. Description Used by
B1
Archive file format B1 Free Archiver
B&W
Black and white graphics file atari - mac
B&W
Mono binary screen image 1st Reader
B
Batch list APPLAUSE
B
Grand Theft Auto saved game Any of the 3D Grand Theft Auto games in either III or IV era.
B_W
Black and white graphics file Atari - mac
B1N
Both mono and color binary screen image 1st Reader
B30
Printer font (JLaser - Cordata) Corel Ventura Publisher
B3D
Blitz3D files Blitz3D
B8
Raw graphics file (one byte per pixel) plane two PicLab
BA
Binary Archive Scifer Archiver and Compression [External Header Mode]
BAC
Compiled BASIC RT-11 BASIC-11
BAD
Bad file Oracle Corporation - many
BAD
Animation file Novalogic
BAD
File which covers bad blocks on disk volume (not to be moved) RT-11
BAK
Backup file
BAL
Music score Ballade
BALANCE
Balance accounting sheet file Balance
BAP
Blaze Audio Wave Information File BlazeAudio MadCap Software
BAR
Horizontal bar menu object file dBASE Application Generator
BAR
Info Bar for GFX2EXE GFX2EXE
BAR
Broker Archive. Compressed file containing number of other files for deployment.[1] IBM WebSphere Message Broker
BAS
BASIC language source QuickBASIC - GW-BASIC - FreeBASIC
Batch file MS-DOS, RT-11
BB
Database backup Papyrus Design Group
BBL
Bibliographic reference file TeX/BibTeX
BBM
Brush Deluxe Paint
BBP
Playlist BassBox
BBQ
BitBeamer Transfer Queue file BitBeamer
BBS
Bulletin Board System announce or text info file
BBS
Hudson-style messagebase FTN software
BC!
Unfinished download Unfinished BitComet download (a BitTorrent client)
BCD
Boot Configuration Data Windows Vista and later, Registry Editor
BCF
Card data Bingo Card Creator
BCH
Batch process object file dBASE Application Generator
BCH
Datafile Datalex EntryPoint 90
BCO
Outline font description Bitstream Inc.
BCP
Borland C++ makefile
BCT
Backup dictionary Clarion
BCW
Environment settings Borland C++ 4.5
BDB
Bookends database Bookends
BDC
Dictionary Lingvo
BDEF
Builder Definition Websphere Portlet Factory
BDF
Adobe Glyph Bitmap Distribution Format Adobe Software
BDF
Binary update file BUPDATE.EXE (c) TNT Techn.
BDF
Bitmap Distribution Format font file X11
BDF
Datafile Egret
BDM
Videoclip AVCHD
BDMV
Blu-ray Video Data Content file Media players / software that supports Blu-ray structure
BDR
Border Microsoft Publisher
BDT
Dictionary Lingvo
BDT
Behandlungsdatentransfer, an xDT application Healthcare providers in Germany
BEF
Bleck Encrypted File
BEZ
Outline font description Bitstream
BF
Brainfuck sourcefile
BF2
Bradford 2 font
BFC
Briefcase Win95 Win95
BFM
Font metrics unix/Frame
BFS
Binary File Storage
BFX
Fax BitFax
BGA
Bitmap graphics
BGI
Borland Graphics Interface device driver Turbo C - Turbo Pascal
BH
Blackhole data compression format
BI
BASIC include file Visual Basic - FreeBASIC
BIB
Bibliography (ASCII)
BIB
Database - not compatible with TeX format Papyrus
BIB
Literature database TeX/BibTeX
BIF
Binary Image Format b&w graphics file Image Capture board
BIK
Bink video file (RAD Video)
Binary file, usually zero-start (.com analog)
BIN
SGI Powerflip
BIN
Text mode memory dump The Draw - TUD - ACiDDraw - etc.
BIO
BioniX Wallpaper playlist file BioniX Wallpaper Changer
BIO
OS/2 BIOS
BIT
Bitmap X11
BK!
Document backup WordPerfect for Win
BK
Faxbook JetFax
BK?
Backup file
BKC
Backup catalog Backup4all
BKF
Backup archive Windows NTBackup Utility
BKn
Timed backup file for document window n WordPerfect for Win
BKP
Backup file Write - TurboVidion DialogDesigner
BKW
Mirror image of font set FontEdit
BLD
BLoaDable picture BASIC
BLD
SYSGEN Build procedure file RT-11
BLEND
Blender3D Project File Blender
BLG
Backup Log ARCSOLO
BLK
Temporary file WordPerfect for Win
BLOB
Unknown Steam (software) for Win
BLP
Blizzard Game Picture Blizzard Entertainment games (various)
BM
BitMap graphics file
BM3
UIQ3 Phone backup
BMD
Nintendo proprietary 3D model file Various Nintendo games
BMK
Help Bookmarks Windows 3.x
OS/2 or Win graphics format (BitMap Picture) QPeg - CorelDraw - PC Paintbrush - many
BMPW
bitmap world-file - geo-references info
BMS
Nintendo proprietary MIDI tracker format Various Nintendo games
BMT
Ami Pro Button Ami Pro
BNA
Data Atlas Boundary
BNK
Adlib instrument bank file
BNR
Graphics Banner Banner - Poster
BOK
Shamela Library book Shamela Library Program
BOO
Book-format READIBM
BOO
Compressed file ASCII archive created by BOO (msbooasm.arc) msbooasm.arc
BOO
Boo programming language source file Boo Programming Language
BOT
Bot files, these go with JKB files Quake 3 Engine
BPC
Chart Business Plan Toolkit
BPOLY
Data Prisms binary 3D object
BPP
Backup application Clarion
BPT
Bitmap fills file CorelDRAW
BPW
Bitser proprietary encrypted password file Bitser password manager
BR
Script Bridge
BRD
Eagle Layout File
BRD
Tanzzle board file Tanzzle
BRD
Cadence Allegro board file Cadence
BRF
Braille Braille embossers and refreshable displays
BRK
Fax Brooktrout Fax-Mail
BRK
The Brake! Mailer REXX script The Brake!
BRL
CAD Ballistic Research Laboratory CAD
BS
Boot sector file SYSLINUX
BS2
Archive BS2.EXE
BSA
Archive BSArc
BSC
Compressed Apple II file archive created by BINSCII BINSCII
BSC
Database Source Browser
BSC
Pwbrmake object file Microsoft Fortran
GoldSource/Source engine map files Valve Corporation
id Tech map files id Software
BSS
boot sector (DOS) file SYSLINUX
BSS
Casio Phone base PC-LINK
BST
BiblioTex file (BiblioTex=bibliography file) TeX
BSY
Busy flag FTN soft
BTM
Batch-to-memory (quick batch) 4dos -ndos
BTN
Makeover Button file
BTX
backup of 4DOS batch files (_4INST.BTM) 4DOS
BUFR
Binary Universal Form for the Representation of Meteorological Data
BUG
Bugs and Problems
BUN
LucasArts Bundle File
BUP
Backup file
BUT
Button definitions Buttons!
BUY
Datafile format movie
BVn
Overflow file below insert point in Doc n WordPerfect for Win
BWB
Spreadsheet application Visual Baler
BWR
Beware (buglist) Kermit
BYK
BYK Compressed File BYK
BYU
BYU Movie BYU
BZ2
Archive bzip2
BZM
Map Blitzkrieg

C[edit]

Ext. Description Used by
C--
C—language source Sphinx C--
C
C language source

Note that on case-sensitive platforms like Unix and with the gcc compiler the uppercase .C extension indicates a C++ source file.

Watcom C/C++, Borland C/C++, gcc and other C compilers
C
Unix file archive COMPACT
C++
C++ language source
C00
Print file Ventura Publisher
C01
Typhoon wave files AWAVE
C32
COMBOOT Executable (32-bit) SYSLINUX
C86
C source code file Computer Innovation C86
CA
Initial cache data for root domain servers Telnet
CA?
Borland packed and split file Borland Installer
CAB
Win 95 packed file Win 95
CAC
dBASE IV executable when caching on/off (see cachedb.bat)
CAD
Drawing BobCAD-CAM
CAD
Document Drafix Windows CAD
CAL
Calendar file Windows 3.x
CAL
Spreadsheet format SuperCalc
CALS
Computer Aided Acquisition and Logistics
CALS
Support Raster Format
CAM
Casio Camera
CAN
Fax Navigator Fax
CAP
Caption Ventura Publisher
CAP
Capture file ProComm - Telix
CAS
C + ASM language source Turbo C
CAT
Catalog CP Backup - dBASE IV
CAT
Device driver digital signature Microsoft Windows
CAT
Stellarium Star Catalogue Stellarium
CATDrawing
Drawing file of CATIA V5 CATIA V5
CATPart
Part file of CATIA V5 CATIA V5
CATProduct
Assembly file of CATIA V5 CATIA V5
CATS
Combined source ATS
CBA
Source code Creative BASIC
CBC
Fuzzy logic system CubiCalc
CBL
COBOL source code file
CBM
Compiled bitmap graphics XLib
CBR
Comic Book Reader (RAR file) CDisplay and similar
CBS
MasterWord button bar configuration file
CBT
COMBOOT Executable (incompatible with DOS COM files) SYSLINUX
CBT
Computer Based Training many
CBZ
Comic Book Reader (ZIP file) CDisplay and similar
CC
C++ source code file
CC
CC language source CC
CCC
Bitmap graphics (native format) Curtain Call
CCF
Communications configuration file Symphony
CCF
Color Chat file Color Chat File
CCH
Chart CorelChart
CCITT
CCITT Group 3 and Group 4 Encoding
CCL
Communication Command Language file Intalk
CCO
BTX Graphics file XBTX
CCT
Print Template BobCAD-CAM
CD
CD description DN
CDA
CD-Audio Win95
CDB
Card database CardScan
CDB
Main database TCU Turbo C Utilities
CDF
Common Data Format
CDF
Company Data File Nominal Small Business Accounting software
CDF
Computable Document Format Mathematica
CDF
Cyberspace Description Format
CDF
Graphics netcdf
CDK
Document Atari Calamus
CDL
CADKey CADL Language CADKey
CDM
Disk Drivers NPA Novell NetWare
CDM
Music format (compressed)
CDO
Music notation Crescendo Music Notation Editor
CDR
Vector graphics format (drawing) CorelDraw!
CDT
Corel Draw Template File CorelDraw!
CDX
Compound index file Visual FoxPro, Advantage Database Server
CE
Computer Eyes Conversion Artist
CE
Main.ce The FarSide Computer Calendar
CEB
Cont. Edge Bitmap Conversion Artist
CEF
CA-Clipper Workbench Application CA Clipper
CEF
Export File
CEF
Compact Embedded Font Adobe Illustrator
CEG
Bitmap graphics Tempra Show - Edsun Continuous Edge Graphics
CEL
Animation CEL 3D Studio
CEL
Graphics Autodesk Animator - Lumena
CF
Configuration file imake
CFA
Audio file Adobe Premiere Pro
CFC
ColdFusion Component Adobe ColdFusion
CFG
Configuration file
CFL
Chart CorelFLOW
CFM
ColdFusion Markup Language Adobe ColdFusion
CFN
Font data Atari Calamus
CFO
C Form Object internal format object file TCU Turbo C Utilities
CFP
Fax The Complete Fax Portable
CFT
CFast graphics file Disney Animation Studio
CGA
CGA display font Ventura Publisher
CGI
Common Gateway Interface script
CGM
Computer Graphics Metafile vector graphics A&L - HG - many
CH
Clipper language header CA Clipper
CH3
Chart Harvard Graphics 3.0
CH4
Presentation Charisma 4.0
CHD
Font descriptor FontChameleon
CHI
ChiWriter Document ChiWriter - Chiview
CHK
Recovered data DOS CHKDSK
CHK
Temporary file WordPerfect for Win
CHL
Configuration History Log
Compiled Help File Microsoft Windows, Help Explorer Viewer
CHML
Encrypted Data File Krasbit Technologies, Chameleon Imaging Workflow Software
CHN
Data Ethnograph 3
CHP
Chapter file Ventura Publisher
CHR
Character set Turbo C - Turbo Pascal
CHT
Chart Harvard Graphics 2.0 - SoftCraft Presenter
CHT
CHeaT in any program/game many
CHT
Interface file for ChartMaster dBASE
CHZ
Archive CHARC
CIF
Caltech Intermediate Format graphics file
CIF
Chapter information Ventura Publisher
CIF
Crystallographic Information File RasMol, Jmol
CiM
C Text Mode Image File The Ultimate Draw
CIX
Database index TCU Turbo C Utilities
CKB
Borland C++ 4.x editor keystroke mapping BCW.EXE
CL
COMMON LISP source code file
CLA
Source Clarion
CLASS
Java class file Java
CLD
Clipper debugger configuration file CA Clipper
CLJ
Clojure source code Clojure
CLP
Clip art graphics file Quattro Pro
CLP
Clipboard file Windows 3.x
CLP
Compiler response file CA Clipper
CLP
Graphics format PCPAINT/Pictor
CLPI
ClipAV Clip Information file for Blu-ray Media hardware / software with Blu-ray structure support
CLPRJ
ClassicLadder project file ClassicLadder
CLR
Color binary screen image 1st Reader
CLR
Color definitions Photostyler
CLR
Color scheme Boxer/2
CLR
Palette file for GIS format
CLS
C++ class definition file
CLW
MFC Class Wizard information Microsoft VC++
CM
Data file CraftMan
CMB
Xtree for Windows Button Bar file
CMD
Command dBASE - Waffle
CMD
Command Prompt batch file Microsoft Windows NT based operating systems
executable programs CP/M-86 operating system
CMD
External command menu 1st Reader
CMD
OS/2 batch/REXX file OS/2
CMF
FM-music file (Creative Music File)
CMK
Card Card Shop Plus
CMM
CMM script (batch) file CEnvi
CMP
Bitmap graphics (Lead CMP compression)
CMP
Compressed data PKWare Inc. data compression library
CMP
Header file for PostScript printer files CorelDRAW
CMP
Photofinish Calibration Map Photofinish
CMP
User dictionary Microsoft Word for DOS
CMRL
Concise message routing language DOTGO
CMS
Content Management System Any Web Browser
CMU
Carnegie Mellon University Formats
CMV
Animation (CorelMove CorelDraw 4.0) CorelMove CorelDraw 4.0
CNC
CNC general program data
CND
System generation conditional file RT-11
CNF
Configuration (program - printer setup) program - printer setup
CNF
Configuration file
CNV
Temporary file WordPerfect for Win
CNV
Winword DLL used as part of an import operation (CNV=converter) Microsoft Word
CO
Cobalt - parametric drafting and 3D modeling Ashlar-Vellum
COB
Calgari trueSpace2 File Format
COB
COBOL source code file
COD
Code definition table UUPC
COD
Datafile Forecast Plus - Microsoft Multiplan - StatPac Gold
COD
file including CODES for any program/game many
COD
Printer code definition file Boxer/2
COD
Program compiled code FORTRAN
COD
Template source file dBASE Application Generator
COD
Videotext file
COE
Coefficient file Xilinx ISE
COF
Animation Control File Diablo II
COL
Color palette Autodesk Animator - many
COL
Spreadsheet Microsoft Multiplan
COL
DIMACS graph data stores a single undirected graph (text and binary variants)
Command (memory image of executable program) DOS
COM
Indirect command file (sequence of commands to be executed) RT-11
CON
Configuration file Simdir
CON
MSTS Consist file MSTS
CPC
Compressed image Cartesian Perceptual Compression
CPD
Script Complaints Desk
CPF
Fax The Complete Fax
CPI
ColorLab Processed Image bitmapped graphics file
CPI
MS-DOS codepage file MODE.EXE
CPL
Control panel file Windows 3.x
CPL
Presentation Compel
CPMZ
ConPro/Miradi Zipfile Miradi and ConPro
CPP
C++ language source Watcom C/C++
CPP
Presentation CA-Cricket Presents
CPR
Knowledge Access GCGW
CPS
backup of startup files by QEMM (?) autoexec.cps
CPT
Encrypted memo file dBASE
CPT
Mac file archive COMPACT PRO
CPT
Template CA-Cricket Presents
CPZ
Music text file COMPOZ
CR2
Raw image format Canon digital cameras
CRA
Advanced crack file (usually text)
CRD
Cardfile Windows 3.x - YourWay
CRD
Map Holux - Alan
CRD
Molecular coordinates CHARMM, RasMol
CRDOWNLOAD
Google Chrome download in progress Google Chrome
CRF
Cross-reference Microsoft MASM - Zortech C++, RT-11 CREF
CRK
Crack file (usually text)
CRP
Encrypted database dBASE IV
CRS
File Conversion Resource WordPerfect 5.1
CRT
Terminal settings information Oracle
CRU
Compressed file archive created by CRUSH
CS
C# source file C#
CSD
Compact Shared Document Dream To Reality
CSG
Batch file (Submit) ISIS/w
CSG
Graph Statistica/w
CSM
Borland C++ 4.x precompiled header file BCW.EXE
CSP
PC Emcee Screen Image file Computer Support Corporation
CSS
Datafile CSS - Stats+
CSS
Datasheet Statistica/w
CSS
cascading style sheet
CSV
Adjusted EGA/VGA palette CompuShow
CSV
Comma Separated Values text file format (ASCII)
CTC
Control file PC Installer
CTF
Character code translation file Symphony
CTK
CommonTime Key file CommonTime software applications
CTL
Control file dBASE IV - Aldus Setup
CTL
BATCH control file (generated by BATCH from .BAT file) RT-11
CTT
BATCH Temporary file RT-11
CTX
Ciphertext file Pretty Good Privacy RSA System
CTX
Course TeXt file some Microsoft online guides
CTX
document Creativyst Table eXchange
CUF
C Utilities Form definition TCU Turbo C Utilities
CUR
Windows resource (cursor image file) Resource Workshop - WRT - Watcom Resource Editor
CUT
Graphics format (bitmapped graphics) dr. Halo
CV4
Color file CodeView
CVP
Cover page WinFax
CVS
Graphics Canvas
CVT
Backup file for CONVERTed database file dBASE IV
CVW
Color file CodeView
CWEB
C Web
CWK
Datafile ClarisWorks, Appleworks
CXX
C++ source code file Zortech C++
CYS
Cytoscape session file Cytoscape

D[edit]

Ext. Description Used by
D
D Programming Language source file DMD
D3V
Video file Nintendo DS (with ARME, MMCF etc.)
D4D
Data Draw 4D object
D4P
Data Draw 4D Pro object
D64
Commodore 64 disk image
D88
Toshiba Pasopeia D88 disk image format A series of emulators of Japanese computers
DAA
Direct Access Archive
DAE
COLLADA file
DAF
Data file Digital Anchor
DAT
Maxum chromatograph chromatogram Siemens Maxum Chromatograph
DAT
LDraw (Sub)Part File, 3D Model LDraw
DAT
Document Microsoft Word Format (old)
DAT
data RSNetWorx Project
DAT
Data file in special format or ASCII
DAT
Database file Clarion (programming language)
DAT
Norton Utilities disc image data. It saves Boot sector, part of FAT and root directory in image.DAT on same drive. Norton Utilities
DAT
Optical disc image (can be ISO9660, but not restricted to) cdrdao, burnatonce
DAT
Video CD MPEG stream
DAT
Windows registry hive (REG.DAT Windows 3.11; USER.DAT and SYSTEM.DAT Windows 95, 98, and ME; NTUSER.DAT Windows NT/2000/XP/7) Microsoft Windows
DATS
Dynamic source ATS
DB$
Temperature debug info Clarion Modula-2
DB$
Temporary file dBASE
DB
Database file Paradox - XTreeGold - dbvista - Oracle - XoftSpySE - Windows thumbnail cache[2][3]
DB
Configuration dBASE IV - dBFast
DB
Multi Edit config ME
DB2
Database dBASE II
DB3
Database dBASE III
DBA
Database file Turbo Prolog - DataEase
DBA
DarkBasic source code
DBC
DataBaseContainer Visual FoxPro
DBD
Business data Business Insight
DBD
Debug info Clarion Modula-2
DBF
Database file dBASE III/IV - Visual FoxPro - dBFast - DataBoss - DBVista - CA-Clipper - Visual Objects - Alaska Xbase++ -

Advantage Database Server

DBG
Debugger script DOS debug - Watcom debugger
DBG
Symbolic debugging information Microsoft C/C++
DBK
Database backup dBASE IV
DBL
DIBOL source file
DBM
Datafile DataEase
DBM
Menu template DataBoss
DBO
Compiled program dBASE IV
DBPro
DarkBasicPro Project
DBS
Data file used by Managing Your Money
DBS
Database in SQL Windows format
DBS
Datafile PRODAS
DBS
Printer description file Microsoft Word, Microsoft Works
DBT
FoxBASE+ style memo FoxPro 2.x
DBT
Memo file for database w/same name dBASE IV - dBFast
DBW
Windows file DataBoss
DBX
DataBeam GCGW
DBX
AutoCAD Database AutoCAD
DBX
Archive File Outlook Express
DC
CAD drawing file DesignCAD 3000 for Windows
DC6
Image file Diablo II
DCA
Document Content Architecture text file IBM DisplayWrite
DCC
Animation Diablo II
DCD
CAD Drawing File DesignCAD 3DMax for Windows
DCF
floppy disk image Disk Copy Fast
DCH
Schematic Drawing file DipTrace Schematic Capture
DCI
Dreamcast Save File Dreamcast
DCL
Delphi Control Library Borland Delphi
DCM
DCM music module AWAVE
DCP
OS/2 device code page OS/2
DCS
Bitmap graphics (CYMK format) QuarkXPress
DCS
Datafile ACT! Activity Files
DCT
Dictionary: used by many programs with program dependent format Clarion
DCT
Spell checking dictionary Harvard Graphics 3.0 - Symphony
DCT
DataBaseContainer Extension Visual FoxPro
DCU
Delphi unit (compiled) Borland Delphi
DCW
Walter Machine Programing Walter Profile Editor
DCX
Multi-page PCX graphics (common fax format) Intel - SpectraFAX
DCX
DataBaseContainer Index Visual FoxPro
DD
Macintosh file archive DISKDOUBLER
DDA
Data GLBasic ASCII 3D object
DDB
Bitmap graphics
DDB
Digidesign Database File Digidesign Pro Tools
DDI
Disk image DiskDupe
DDP
Device Driver Profile file OS/2
DDS
DirectDraw Surface file Microsoft Flight Simulator, other Microsoft programs
DEB
DEBUG script DOS Debug
DEF
Assembly header file Geoworks
DEF
Defaults - definitions
DEF
Linker definition file TLink - WLink...
DEM
Demonstration
DEM
Digital Elevation Model
DEM
Graphics file VistaPro
DEM
Vista DEM file Meta.exe VP3
DES
Ascii text parameter description AWAVE
DESKLINK
Windows Explorer Desktop Control (commonly "Desktop (create shortcut).DESKLINK", 0 bytes). Uses a 'special' hidden file extension (NeverShowExt flag inside the Registry), overriding the Windows Explorer option of showing/hiding file extensions.
desktop
Desktop Entry freedesktop.org
DEV
Device driver
DEV
SYSGEN handler build procedure RT-11
DEV
Dev-C++ project file Dev-C++
DFD
Data Flow Diagram graphic file Prosa
DFF
RenderWare model data (e.g. Grand Theft Auto III and later)
DFI
Outline font description Digifont
DFL
Default program settings Signature
DFM
Data Flow Diagram model file Prosa
DFM
Delphi form module Borland Delphi
DFS
Delight Sound File
DFV
Printing form (Word) Microsoft Word
DFX
Micrografx Effects DLL
DGN
Graphics file MicroStation
DGS
Diagnostics
DH
Dependency information for .ph Geoworks
DHP
Dr. Halo PIC Format graphics file Dr. Halo II - III
DHT
Datafile Gauss
DI
D Programming Language interface file DMD
DIA
Diagraph graphics file Computer Support Corporation
DIB
Device Independent Bitmap rarely used Windows 3.0 bitmap; Win - OS/2
DIC
Dictionary (e.g. from WinWord)
DIF
Borland patch data file Borland patch
DIF
Data Interchange Format Visicalc
DIF
OS/2 V2.2 Display Information File OS/2
DIF
Output from Diff command - script for Patch command
DIF
SRCCOM, BINCOM output file RT-11
DIG
Digilink AWAVE
DIG
Sound Designer 1 audio file AWAVE
DIP
Graphics
DIP
Watcom debug info processor WatcomDebugger
DIP
PCB Drawing file DipTrace PCB Layout
DIR
Dialing directory file Procomm Plus
DIR
Directory file VAX - CPS Backup
DIR
Movie MacroMind Director 4.x
DIR
Directory listing file RT-11
DIS
Distribution file VAX Mail
DIS
Thesaurus CorelDraw
DIZ
Description file (Description In Zip)
DJVU
DJVU Document Format, a format similar to PDF but with higher compression rates at the same quality. DJVU
DKB
Raytraced graphics DKBTrace
DL
Animation format (Italian origin) Display - DL Viewer
DLD
Lotus 1-2-3
DLF
Dialogue Live Format Produced by Exstream Dialogue and edited by Dialogue Live Editor
DLG
Dialog resource script file Microsoft Windows SDK
DLG
Dialog resources DN
DLG
Windows SDK dialog editor data file
DLG
Windows SDK dialog editor data file
DLL
Dynamic-link library Windows 3.x - OS/2
DLL
Export/import filter CorelDRAW
DLM
Microsoft File Transfer Manager Microsoft File Transfer Manager
DLP
Data DAQLab
DLS
Setup Norton Disklock
DMF
Music format (Delusion Digital Music File) Delusion
DMF
DeleD files
DMG
Apple Disk Image Mac OS X (Disk Utility),
DMO
Demo Derive
DMP
Dump file (e.g. screen or memory)
DMP
DUMP utility output file RT-11
DMS
Amiga file archive DISKMASHER
DNG
Digital Negative (DNG), a publicly available archival format for the raw files generated by digital cameras At least 30 camera models from at least 10 manufacturers, and at least 200 software products
DNT
data RSNetWorx Project
DO
Java servlet file Web browser (Various)
DOC
A Document, or an ASCII text file with text formatting codes in with the text; used by many word processors Microsoft Word and others
DOCM
Microsoft Word 2007 Master document Microsoft Word 2007
DOCX
Office Open XML Text document Microsoft Word
DOF
Delphi project options file Borland Delphi
DOG
Screen file Laughing Dog Screen Maker
DOH
Dependency information for .poh Geoworks
DOR
Roland Digital audio file Roland
DOS
External command file 1st Reader
DOS
Network driver (e.g. pkt_dis.dos)
DOS
OS/2 V3 SVGA PMI-File Svga.exe
DOS
renamed system files (AUTOEXEC.BAT, COMMAND.COM, CONFIG.SYS,DBLSPACE.BIN, DRVSPACE.BIN, IO.SYS, MSDOS.SYS) of previous MS-DOS version Windows 95, 98, ME (dual-boot feature)
DOS
Text file containing DOS specific info
DOT
Line-type definition file CorelDRAW
DOT
Microsoft Word document template Microsoft Word
DOTX
Office Open XML Text document template Microsoft Word
DOX
Text file MultiMate 4.0
DOZ
Description Out of Zip VENDINFO
DP
Calendar file Daily Planner
DP
Data file DataPhile
DPR
Default project- and state-related information Borland C++ - Delphi - C
DPF
Bareboard PCB CAD/CAM format Ucamco
DPX
Digital Moving Picture Exchange
DRP
Web3D File Web3D
DRS
Display Resource WordPerfect for Win
DRV
Driver
DRW
Designer vector graphics file Designer - MicroGraphix
DS
TWAIN Data Source Any twain-source must supply one xxx.ds file
DS1
Map file Diablo II
DS4
Vector graphics Micrografx Designer 4.x
DSC
Celestia Deep Space Catalog file Celestia
DSC
Description file
DSC
Discard file Oracle
DSD
Database DataShaper
DSF
Data Storage Format Golden Helix
DSF
Delusion Digital Sound File Delusion
DSK
Desktop configuration BP - DN - BC++ - TP
DSK
Disk Drivers Novell NetWare
DSK
Logical disk file RT-11
DSM
Digital Sound Module DSI
DSN
Design Object System Designer
DSP
Display parameters Signature
DSP
Dynamic Studio Professional Module Dynamic Studio
DSP
Graphics display driver Dr. Halo
DSP
Norton viewer DLL Win
DSP
Visual Studio 6 project file Microsoft Visual Studio
DSR
Driver Resource WordPerfect for Win
DSS
Screensaver file DCC
DSS
Digital Speech Standard (Sound) Digital Soup
DSS
SQL Script for .Time Framework Exaktime
DST
Tajima Embroidery Format Embroidermodder
DST
WAIN (Scanner spec) data source DLL Win
DSV
Nintendo DS battery save DeSmuME, DraStic
DSW
Borland C++ 4.x desktop layout file BCW.EXE
DSY
DAISY container file ADAKTA.EXE
DT1
Tile file Diablo II
DT2
msn-emoticon paint
DT_
Data fork of a Macintosh file Mac-ette
DTA
Data file Turbo Pascal - PC-File - Stata
DTB
Database Backup for .Time Framework Exaktime
DTF
Database file PFS - Q&A
DTL
Django template language djangoproject
DTM
DigiTrekker music module AWAVE
DTO
data Directory Toolkit output
DTP
Desk Top Publishing Document Timeworks / greenstreet Publisher3/ Greenstreet Publisher 4.5
DTP
Page Magic 2.0 publication Page Magic 2.0 upgrades to Greenstreet Publisher
DTP
Publication Publish-It! upgrades to Greenstreet Publisher
DTS
Torque Game Engine model format
DVC
Data Lotus 1-2-3
DVDPROJ
iDVD project file iDVD (Apple iLife '08)
DVI
DeVice Independent document TeX
DVP
DESQView run-file DESQView
DVP
Device parameter file AutoCAD
DW2
Drawing DesignCAD for DOS, & DesignCAD for Windows
DWB
Coryphaeus Software Designers Workbench CSD
DWC
Archive DWC
DWD
DiamondWare Digitized file AWAVE
Drawing AutoCAD, IntelliCAD, PowerCAD, Drafix, etc.
DWZ
DVD MovieFactory for TOSHIBA Project File, Designer vector graphics file Designer - MicroGraphix or TOSHIBA
DX
Text file DEC WPS/DX format - DEC WPS Plus
DXF
Dialogue Exchange Format Exstream Dialogue
DXF
Drawing Interchange File Format vector graphics AutoCAD, IntelliCAD, PowerCAD, etc.
DXN
Fax Fujitsu dexNET
DXP
SpotFire data TIBCO Spotfire
DXP
ISO creation project file CD Burner XP Pro
DYLIB
Dynamic Library Mac OS-X
DYN
Data Lotus 1-2-3

E[edit]

Ext. Description Used by
E
E language source code E
E##
EnCase Evidence File chunk EnCase Forensic Analysis Suite
E00
ArcInfo interchange file GIS software
E2D
2-dimensional vector graphics file Editor included in JFire
EAS
Extended file attributes OS/2
EAR
Enterprise archive archive
EBA
Source code Emergence BASIC
EBD
versions of DOS system files (AUTOEXEC.BAT, COMMAND.COM, CONFIG.SYS, WINBOOT.SYS, etc. ) for a emergency boot disk Windows 98, ME
EBJ
Error-checking object file Geoworks
EBQ
CITE standard electronic BQ exchange file
EC
Error checking preprosessed Goc source code Geoworks
EC
Source code Ecere SDK
ECC
Error-checking file dvdisaster
ECE
Escenic Contentng Engine dynamic page Escenic
ECMS
Status document ECMerge
ECMT
Template document / Session ECMerge
ED5
EDMICS GCGW
EDA
Ensoniq ASR disk image AWAVE
EDE
Ensoniq EPS disk image AWAVE
EDF
European data format Medical timeseries storage files
EDF
Exchequer Document Format IRIS Software
EDK
Ensoniq KT disk image AWAVE
EDL
EDL Premiere
EDQ
Ensoniq sq1,2/ks32 disk image AWAVE
EDS
Ensoniq SQ80 disk image AWAVE
EDT
Default settings VAX Edt editor
EDT
Ensoniq TS disk image AWAVE
EDT
External editors definitions DN
EDV
Ensoniq VFX-SD disk image AWAVE
EEB
Button bar for Equation Editor WordPerfect for Win
EFA
Ensoniq ASR file AWAVE
EFA
Encrypted File Archive
EFE
Ensoniq EPS file AWAVE
EFE
Ensoniq EPS instrument file AWAVE
EFK
Ensoniq KT file AWAVE
EFQ
Ensoniq SQ1/SQ2/KS32 file AWAVE
EFS
Ensoniq SQ80 file AWAVE
EFT
Ensoniq TS file AWAVE
EFT
High resolution screen font ChiWriter
EFV
Ensoniq VFX-SD file AWAVE
EFX
Fax Everex EFax
EGA
EGA display font Ventura Publisher
EKA
Internal data files Borland's Eureka
EL
ELISP source code file Emacs lisp
ELB
Synergy/DE library
ELC
Compiled ELISP code Emacs lisp
ELFO
ElsterFormular
ELI
Archive ELI
ELT
Event list text file Prosa
EMAIL
Email file. Notepad
EMAKER
E language source code (maker) E
EMC
Striata Reader Encrypted Document Format
EMD
ABT Extended MoDule AWAVE
Microsoft Enhanced Metafile
EML
Stationery Template Outlook Express
EMU
Terminal emulation data BITCOM
ENC
Encoded file - UUENCODEd file Lotus 1-2-3 - uuexe515.exe
ENC
Music Encore
END
Arrow-head definition file CorelDRAW
ENFF
Extended Neutral File Format
ENG
Dictionary engine Sprint
ENG
English documentation
ENG
Graphics file (charting) EnerGraphics
ENV
Envelope or Environments
ENV
Enveloper macro WOPR
ENV
Environment file WordPerfect for Win
EOT
Embedded Open-Type
EPA
Award BIOS splash screen Award BIOS, XnView
EPD
Publication Express Publisher
EPI
Document Express Publisher
EPI
Encapsulated PostScript graphic file
EPS
Encapsulated PostScript (Graphics format) CorelDraw - PhotoStyler - PMView - Adobe Illustrator - Ventua Publisher
Electronic Publication - (e-Reader format) Okular (Linux) - Apple iBooks - Sony Reader - Adobe Digital Editions - Calibre (LMW)
EQN
Equation filE WordPerfect for Win
ERD
Entity Relationship Diagram graphic file Prosa
ERL
Erlang source code file
ERM
Entity Relationship Diagram model file Prosa
ERR
Compiler/linker error report
ESH
Extended Shell batch file
ETH
Document Ethnograph 3
ETF
Encrypted Text File. Used in some security programs.
ETW
Proprietary format from EnterTech for the MagicSing/Mic Karaoke product line. Enter-Tech
ETX
Structure-enhanced text for some ascii text browsers
EUI
Ensoniq EPS family CD image AWAVE
EVT
Events descriptions
EVT
Windows Event log file Microsoft Windows NT 4.0 - XP; Microsoft Event Viewer
EVTX
Windows Event log file XML structured Microsoft Windows Vista, 7, 8; Microsoft Event Viewer
EVY
Document WordPerfect Envoy
EWD
Document Express Publisher for Windows
EX3
Device driveR Harvard Graphics 3.0
EXB
Audio File E-MU Systems Emulator X Sampler File
EXC
Exclude file for Optimize (do not process) (QEMM) QEMM
EXC
REXX source code file VM/CMS
Directly executable program DOS
EXF
Excute file OnHand PC
EXM
MSDOS executable, system-manager compliant (HP calculator) HP calculator
EXP
Drawing File format Drawing Express
EXP
Melco Embroidery Format Embroidermodder
EXP
Protected mode EXE by PharLap Software PharLap
EXP
Exports Library File VisualStudio
EXS
Audio File Apple Logic Pro EXS instrument
EXT
Extensions descriptions file
EXX
Intermediate file by MsgPut IBM LinkWay
EZW
easyOFFER document file[4] easyOFFER by Reagency Systems Corp.
EZF
Fax Calculus EZ-Fax

F–L[edit]

M–R[edit]

S–Z[edit]

References[edit]

External links[edit]