C	Site configuration for Secure Remote (CheckPoint VPN)
C	C code
C--	Sphinx C-- Source code
C00	Ventura Publisher Print file
C01	Typhoon wave
C86	Computer Innovation (C86) Source code
CA	Telnet Server Initial cache data file
CAB	Microsoft cabinet file (program files compressed for software distribution)
CAC	dBase IV Executable file
CACHE	Shared Cache file
CAD	Softdesk Drafix Cad file
CAG	Catalog file (Microsoft Clip Gallery v. 2.x,3.x,4.x)
CAL	SuperCalc 4/5 Spreadsheet
CAL	Calendar schedule data file
CAL	CALS Compressed Bitmap
CAM	Casio camera file
CAN	Navigator Fax
CAP	Compressed music file
CAP	Telix Session Capture file
CAP	Ventura Publisher Caption
CAR	AtHome assistant file
CAS	Comma-delimited ASCII file
CAT	dBase Catalogue file
CAT	Quicken IntelliCharge categorization file
CB	Microsoft clean boot file
CBC	CubiCalc Fuzzy Logic System file
CBF	Vietcong (game) Pterodon big file
CBI	Column binary file (used in IBM mainframe systems)
CBL	Cobol Source code
CBM	XLib Compiled Bitmap
CBR	Comic book or paperback RAR file (decompress with RAR utility)
CBT	Generic Computer based training file
CBZ	Comic book or paperback ZIP file (decompress with WinZip or similar program)
CC	C++ Source code
CC	Visual dBASE custom class file
CC3	Close Combat 3 file
CCA	cc:mail archive file
CCB	Visual Basic Animated Button configuration file
CCC	Curtain Call Native bitmap graphic
CCD	Elaborate Bytes Clone CD mapfile for creating and reading .img files
CCE	Data file (Calendar Creator Plus)
CCF	Symphony Communications Configuration file
CCF	Multimedia Viewer configuration file used in OS/2
CCH	Corel Chart
CCL	Intalk Communication Command Language
CCM	Lotus CC:Mail "box" file (for example, INBOX.CCM)
CCO	XBTX Graphics
CCO	CyberChat data file
CCT	Macromedia Director Shockwave cast file
CDA	CD Audio Track
CDB	CardScan Database (CardScan)
CDB	TCU Turbo C Utilities Main database
CDB	Conceptual model backup file (PowerDesigner)
CDB	Clipboard file
CDF	Microsoft Channel Definition Format
CDF	Netcdf Graphic file
CDFS	Compact Disk filing system (WindRiver)
CDI	Phillips Compact Disk Interactive file
CDK	Atari Calamus Document
CDM	Visual dBASE custom data module
CDM	Conceptual data model file (PowerDesigner Data Architect) (Sybase)
CDM	Conceptual model file (PowerDesigner)
CDR	Raw Audio-CD data file
CDR	Corel Vector Graphic Drawing File
CDR	Corel Draw Vector drawing file
CDT	CorelDraw Data file
CDT	Corel Draw template
CDX	Microsoft's Visual Foxpro index
CDX	Corel Draw compressed drawing
CE	The FarSide Computer Calendar Main CE file
CEF	Cruzer encrypted file (used to secure files on Cruzer USB flash drives)
CEG	Tempra Show Bitmap graphic
CEL	AutoDesk Animator Cel Image
CEL	CIMFast Event Language file
CER	Certificate file (MIME x-x509-ca-cert)
CEX	Caddie Exchange file
CF	Imake Configurtion file
CFB	Comptons Multimedia file
CFG	Configuration file
CFL	CorelFLOW Chart
CFM	Visual dBASE Windows customer form
CFM	Corel FontMaster file
CFM	Creative FM-Music
CFM	ColdFusion template
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	Clipper 5 Header
CH	OS/2 configuration file
CH3	Harvard Graphics 3.0 Chart
CH4	Charisma 4.0 Presentation
CHD	FontChameleon Font descriptor
CHF	pcAnywhere remote control file
CHI	ChiWriter Document
CHK	WordPerfect for Windows Temporary file
CHK	File fragments saved by Windows Disk Defragmenter or ScanDisk
CHL	Configuration History Log
CHM	Compiled HTML file
CHN	Ethnograph Data file
CHP	Ventura Publisher Chapter file
CHR	Character Sets (Font file)
CHT	Harvard Graphics Vector file
CHT	ChartMaster dBase Interface file
CHT	ChartViewer file
CIF	Easy CD Creator image
CIF	pcAnywhere caller file
CIF	CalTech Intermediate Graphic
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
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
CKB	Borland C++ Keyboard mapping file
CKF	Casio Keyboard File
CL	Generic LISP Source code
CL3	Layout file (Adaptec Easy CD Creator)
CLASS	Java class
CLC	TI-83 Plus Flash Debugger file
CLG	Disk Catalog database
CLL	Cricket Software Clicker File
CLO	Cloe Image
CLP	Quattro Pro Clip art
CLP	Clipper 5 Compiler Script
CLP	Windows Clipboard
CLR	PhotStyler Color defintion
CLR	1st Reader Binary color screen image
CLS	C++ Class Definition
CLS	Visual Basic Class Module
CLX	Macro ToolsWorks Macro file
CLX	Rational XDE file
CLX	Adobe file
CM	Craftman Data
CMA	Database file in plain text format (APPLIX TM1)
CMD	DOS CP/M command file
CMD	dBase-II program file
CMD	1st Reader External Command Menu
CMD	Command file for Windows NT (similar to a DOS .BAT file), OS/2
CMF	Corel Metafile
CMG	Chessmaster saved game
CMK	Card Shop Plus file
CMM	CEnvi Batch file
CMP	Address document
CMP	CorelDRAW 4.0 Postscript Printer Header
CMP	Route 66 Address Document
CMP	Microsoft Word for DOS User dictionary
CMP	JPEG Bitmap
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	WordPerfect for Windows Temporary file
CNV	Conversion files (WS_FTP Pro) files that will be converted from (Example) "HTML-"HTM" for upload
CNV	Word for Windows Data conversion support file
COB	COBOL Source code
COB	trueSpace 2 object
COD	FORTRAN Compiled code
COD	dBase Application Generator Template source file
COD	Video Text file
COD	Microsoft C compiler output as displayable machine language/assembler with original C as comments
COE	Xilinx coefficient
COL	Microsoft Multiplan Spreadsheet
COL	AutoDesk Animator Color Palette
COM	Command file (program)
CON	Simdir Configuration file
CP	CryptoPad.NET Encrypted document
CP8	CP8 256 Gray Scale image
CPD	Fax Cover document
CPD	Complaints Desk Script
CPD	Corel PrintOffice file (drawing)
CPE	Fax Cover document
CPF	The Complete Fax (Fax file)
CPF	CORDIS CPF Editor Contract Preparation Form Submission File
CPF	Color palette file
CPH	Image file (Corel Print House) see CPO
CPI	ColorLab Processed Image bitmap
CPI	Microsoft MS-DOS code page information
CPJ	CeQuadrant CD Project
CPL	Compel Presentation
CPL	Corel color palette
CPL	Control Panel Module
CPM	Turbo Pascal DOS file
CPMZ	Used to exchange project data between Miradi and ConPro
CPO	Image file (Corel Print Office)
CPP	CA-Cricket Presents presentation
CPP	C++ Source code
CPR	Corel Presents presentation
CPS	Coloured postscript
CPS	Central Point PC Tools Backup
CPT	Macintosh Compressed Archive
CPT	dBase Encrypted Memo
CPT	CA-Cricket Presents Template
CPT	Corel Photo-Paint image
CPX	Corel Presentation Exchange compressed drawing
CPY	Data file (Copy Books)
CPZ	COMPOZ Music Text
CRC	Check file (Win-SFV32)(Fantasia Software)
CRC	Circular reference file (Pro/Engineer)
CRD	Microsoft Windows 3.x Cardfile
CRF	Zortech C++ cross-reference
CRH	Image file (Microsoft Golf)
CRP	Visual dBASE custom report
CRP	dBase IV Encrypted database
CRP	Corel Presents run-time presentation
CRS	WordPerfect 5.1 for Windows File Conversion resource
CRT	Oracle Terminal settings information
CRT	Crontab file)
CRT	Certificate file
CRU	CRUSH Compressed archive
CS1	Sinar CaptureShop raw file for Macintosh
CS16	Sinar CaptureShop raw file for Macintosh
CS4	Sinar CaptureShop raw file for Macintosh
CSA	Comma deliminated text
CSC	Corel script
CSG	Statistica/w Graph file
CSH	C shell script files (Hamilton Labs)
CSM	Script file (Kodak Dc265 Camera)
CSM	Borland C++ 4.5 Precompiled header
CSO	Customer service data and outcome file
CSP	PC Emcee On-Screen image
CSS	Statistica/w Datasheet
CSS	Cascading Style Sheet (MIME)
CSS	Stats+ Datafile
CST	Macromedia Director "Cast" (resource) file
CSV	CompuShow Adjusted EGA/VGA Palette
CSV	Comma-separated values file
CT	A graphic file associated with the Paint Shop Pro Graphic Editor
CT	Scitex CT bitmap
CTB	AutoCAD Color-dependent Plot Style Table
CTC	PC Installer Control
CTF	Symphony Character code translation
CTL	dBase IV Control
CTL	Used in general for files containing control information. FAXWorks uses it to keep information about each fax sent and received.
CTX	Pretty Good Privacy (PGP) Ciphertext file
CTX	Microsoft Online Course Text
CTX	Visual Basic User control binary file
CUE	CDRWin (and others) Description File for a CD-Image
CUE	Microsoft Cue Cards Data
CUE	ALCATech BPM Studio Cue Points
CUL	Cursor library file (IconForge)
CUR	Windows Cursor
CURSOR	Sun Microsystems Cursor
CUT	Dr Halo Bitmap
CV	Microsoft CodeView information screen
CV	Corel Versions archive
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
CZIP	Encrypted Zip File

B	Applause Batch list
B_W	Atari/Macintosh black and white graphic
B&W	1st Reader Mono binary screen image
B&W	Atari/Macintosh black and white graphic
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)
BAD	Oracle bad file
BAK	Backup file
BAL	Ballade Music score
BAND	Garageband Project song
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	Datalex Entry Point 90 Data file
BCH	Batch Process Object (dBase Application Generator)
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	Egret Datafile
BDF	West Point Bridge Designer file
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	Fax document file (BitFax)
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	TeX/BibTeX Literature Database
BIB	Database
BIB	Bibliography file (ASCII)
BIF	Image Capture Board Binary Image black & white graphic
BIF	GroupWise initialization file
BIFF	XLITE 3D file
BIG	Electronic Arts Game MOD File
BIN	Binary file
BIO	OS/2 Bios file
BIT	X11 Bitmap
BK	JetFax Faxbook file
BK	Backup file (Generic)
BK!	WordPerfect for Windows Document backup
BK$	Backup file (Generic)
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	Microsoft Works Spreadsheet Backup
BKS	IBM BookManager Read bookshelf file
BKW	FontEdit Fontset mirror image
BLB	Resource archive (DreamWorks),(Neverhood)
BLD	BASIC Bloadable picture file
BLK	WordPerfect for Windows Temporary file
BLK	Alias Wavefront Image
BM	Windows system Bitmap
BM1	Apogee BioMenace data
BMA	Song format used by Beatmania emulators
BMF	Corel Gallery file
BMF	Binary Material File
BMK	Windows Help bookmark
BMP	Windows or OS/2 bitmap
BN	Instrument bank file (AdLib)
BNK	Instrument Bank file (AdLib)
BNK	Sound effects bank file (Electronic Arts)
BOL	Compressed archive library file (Microsoft Booasm.arc)
BOM	Bill of materials file (Orcad Schematic Capture)
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
BR0	PrintMaster graphics file
BRD	Eagle Layout file
BRK	Brooktrout Fax-Mail file
BRW	Application file associated with financial institution(s) loan applications
BRX	A file for browsing an index of multimedia options
BRZ	DbBRZ file for very large Db backup or restore
BS_	Microsoft Bookshelf Find Menu shell extension
BS1	Apogee Blake Stone data file
BSA	BSARC Compressed archive
BSC	Fortran Pwbrmake Object
BSC	MS Developer Studio (MSDev) browser information
BSC	Apple II Compressed archive
BSP	Quake map file
BTM	Batch file used by Norton Utilities
BTR	Database file (Btrieve 5.1)
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	Silicon Graphics Raw red,green and blue bytes file
BW	SGI Black and White image file
BWB	Visual Baler Spreadsheet application
BWR	Kermit Beware buglist
BWV	Business Wave file
BYU	BYU Movie
BZ	Bzip compressed file (Inix)
BZ2	Bzip compressed file (Unix) (replaces Bz) Goto Next

File extension list

A	Library file (Unix)
A	Object code library
A3L	Authorware 3.x library
A3M	Authorware MacIntosh file (unpackaged)
A3W	Authorware Windows file (unpackaged)
A4L	Authorware 4.x library
A4M	Authorware MacIntosh file (unpackaged)
A4P	Authorware file (packaged without runtime)
A5L	Authorware 5.x library
A5W	Authorware Windows file (unpackaged)
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
ABK	Backup file (PrintMaster Gold)
ABM	Audio album file (HitPlayer)
ABO	Applix Builder Turbo file
ABP	Barcode profile file in Alver Valley Software's AVS Barcode Source
ABS	Standard GNU compiler output file for a PC platform
ABS	Sometimes used to denote an abstract (as in an abstract or summary of a scientific paper) AutoBackup
ABS	MPEG Audio Sound file
AC$	AutoCAD Undo Info file
AC3	Dolby Digital audio files used on DVDs
ACA	HTTP animation file (Microsoft Agent)
ACA	Project Manager Workbench file
ACB	ACBM Graphic image
ACC	DR-DOS Viewmax file
ACD	Character definiton file (Microsoft Agent)
ACE	ACE Archiver Compression file
ACF	HTTP character file (Microsoft Agent)
ACI	ACI development appraisal (ACIWEB)
ACL	Corel Draw 6 keyboard accelerator file
ACM	Interplay compressed sound file (Fallout 1,2, Baulder's Gate)
ACM	Dynamic Link Library (DLL)
ACM	Windows system directory file
ACP	Microsoft Office Assistant Preview file
ACR	American College of Radiology file
ACS	Character structered storage file (Microsoft Agent)
ACT	FoxPro Foxdoc Action Diagram
ACT	Action Presentation
ACT	Documenting wizard action diagram (Microsoft Visual FoxPro)
ACT	Microsoft Office Assistant Actor file
ACV	Used to Compress and decompress audio data
AD	After Dark screensaver
Ada	Ada source text file (non-GNAT)
ADB	HP 100LX Organizer Appointment database
ADB	Ada source text body file (GNAT)
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	Windows NT policy template
ADM	After Dark MultiModule screensaver (Microsoft)
ADN	Lotus 1-2-3 Add-In file
ADP	FaxWorks Faxmodem setup file
ADP	Astound Dynamite file
ADP	Dynamic Page file (AOLserver)
ADR	Smart Address address book
ADR	After Dark Randomizer screensaver
ADS	Ada source text specification file (GNAT)
ADT	AdTech Fax file
ADT	HP NewWave datafile for card applications
ADX	Lotus Approach dBase Index
ADX	Archetype Designer Document
ADX	Dynazip Active Delivery script
ADZ	Packed ADF file (Extracts with WinZip)
AE	Author/Editor file (SoftQuad)
AEP	ArcExplorer project file
AF2	ABC FlowCharter 2.0 Flowchart
AF3	ABC Flowchart
AFC	Apple Sound file
AFI	Truevision Bitmap graphic
AFM	HP NewWave Cardfile application
AFM	Adobe metrics
AG	Applix graphic
AI	Corel Trace drawing
AI	Adobe Illustrator 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 Input Output
AIS	Velvet Studio Instruments file
AIS	Xerox Arry of Intensity Samples Graphic
AIS	ACDSee Image Sequence
AIX	HP NewWave Cardfile Application data
AKB	HaleyAuthority Authority Knowledge Base File
AKW	Contains all A-keywords in the RoboHELP Help Project Index Designer not associated with topics
ALAW	European Telephony audio
ALB	JASC Image Commander album
ALI	Document file (SAP proprietary format)
ALIAS	Alias Image
ALL	WordPerfect for Windows General printer information file
ALL	Arts & Letters Library
ALS	Alias Image
ALT	WordPerfect Library Menu
AM	Applix SHELF Macro
AMF	DSMIA/Asylum module music (Crusader,No Remorse,Aladdin)
AMF	Music file (Advanced Module Format)
AMG	ACTOR System image
AMG	AMGC Compressed Archive File
AMI	Annotation file (Cocreate SolidDesigner)
AMS	Extreme's Tracker Module
AMS	Velvet Studio music module (MOD) File
AMU	Sony Photo Album
AN	Text file (Sterling Software) (Groundworks COOL Business Team Model)
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
AOM	Adobe Download Manager Online Manager Shortcut
AOM	Adobe After Effects Output Settings
AOS	Nokia 9000 Add-on software
AOT	Applicatio binary object template file (ZenWorks snAPPshot)
AP	WHAP Compressed Amiga archive
AP	Applix Presents file
APC	Lotus 1-2-3 Printer driver
APC	Compiled application file (Centura Team Developer)
APD	Lotus 1-2-3 Printer driver
APD	Dynamic application library file (Centura Team Developer)
APE	Winamp Plugins AVS File
APE	Monkey's Audio Lossless Audio Compression Format
APF	Project file (Allaire) (Created by Homesite)
APF	Lotus 1-2-3 Printer driver
API	Lotus 1-2-3 Printer driver
API	Application Program Interface; used by Adobe Acrobat
APL	APL Workspace file
APL	Application library file (Centura Team Developer)
APP	Symphony Add-in Application
APP	Generated application or active document (Microsoft Visual FoxPro)
APP	dBase Application Generator Object
APP	DR-DOS Executable Application
APP	FoxPro Generated Application
APP	Normal mode application file (Centura Team Developer)
APR	Employee Appraiser Performance Review file
APR	Lotus Approach 97 View file
APR	ArcView project file
APS	Advanced patching systems with error checking, (Similar to IPS)
APS	Microsoft Visual C++ file
APT	Text mode application file (Centura Team Developer)
APT	Lotus Approach Data view file
APX	Borland C++ Appexpert database
APX	Lotus Approach Paradox-Specific information file
AQ	Applix data
ARC	SQUASH Compressed archive
ARC	LH ARC (old version) compressed archive
ARF	Automatic Response file
ARI	Aristotle audio file
ARI	ARI Compressed archive
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	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
ART	Xara Studio drawing
ARX	AutoCAD Runtime Extension
ARX	ARX Compressed Archive
AS	Applix Spreadsheet
ASA	Microsoft Visual InterDev file
ASC	PGP armored encrypted file
ASC	ASCII text file
ASD	Lotus 1-2-3 Screen driver
ASD	Microsoft Advanced Streaming Format (ASF) description file; opens with NSREX
ASD	Astound Presentation
ASD	WinWord AutoSave file
ASE	Velvet Studio Sample file
ASF	Microsoft Advanced Streaming Format
ASF	StratGraphics Datafile
ASF	Lotus 1-2-3 Screen font
ASF	Music file (Electronic Arts)
ASH	TASM 3.0 Assembly language header
ASI	Borland C++/Turbo C Assembler Include file
ASM	Pro/E assembly file
ASM	Assembler Language source file
ASO	Astound Dynamite Object
ASP	Procomm Plus setup and connection script
ASP	Astound Presentation
ASP	Active Server Page (an HTML file containing a Microsoft server-processed script)
ASRTC	AurelloSoft Removal Tool Configuration File
AST	Claris Works "assistant" file
AST	Astound multimedia file
ASV	DataCAD Autosave file
ASX	Microsoft Advanced Streaming Redirector file
ASX	Video file
ASX	Cheyenne Backup script
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	Audio U-law (pronounced mu-law)
AU	Sun/NeXT/DEC/UNIX sound file
AUD	Audio file (Westwood Studios) (Kyrandia 3,C&C,RedAlert,C&C:TS)
AUP	Audacity project file
AUX	ChiWriter Auxilliary Dictionary file
AUX	TeX/LaTeX Auxilliary Reference file
AVA	Avagio Publication
AVB	Inculan Anti-Virus virus infected file
AVG	AVG Virus Information Database
AVI	Microsoft Audio Video Interleaved file for Windows movie
AVR	Audio Visual Research file
AVS	Stardent AVS-X Image
AVS	Application Visualization System file
AVX	File Extension (ArcView)
AW	Applix Words file
AW	HP AdvanceWrite Text file
AWD	FaxView Document image
AWE	Acrobat Bookmark XML File
AWK	AWK Script/Program
AWM	Animation Works Movie
AWR	Telsis file for digitally stored audio
AWS	StatGraphics Data file
AXL	ArcIMS XML project file
AXT	ASCII application object template (ZenWorks snAPPshot)
AXX	ARJ compressed file from a multi-volume archive (xx = a number from 01 to 99) Go to next