EVERY FILE FORMAT IN THE WORLD
			------------------------------

A 	Object code library 
AAM 	Authorware shocked file 
AAS 	Authorware shocked packet 
ABF 	Adobe Binary Screen Font 
ABK 	Corel Draw AutoBackup 
ACE 	Compression file format associated with a program called The 
	Ace Archiver 
ACL 	Corel Draw 6 keyboard accelerator 
ACM 	Used by Windows in the system directory 
ACP 	Microsoft Office Assistant Preview file 
ACR 	American College of Radiology file format 
ACT 	Microsoft Office Assistant Actor file 
ACV 	OS/2 drivers that compress and decompress audio data 
AD 	After Dark screensaver 
ADA 	Ada source text (non-GNAT) 
ADB 	Ada source text body (GNAT) 
ADB 	Appointment database used by HP 100LX organizer 
ADD 	OS/2 adapter drivers used in the boot process 
ADF 	Amiga Disk File 
ADI 	AutoCAD Device-Independent binary plotter format 
ADM 	After Dark MultiModule screensaver 
ADP 	Used by FaxWorks to do setup for fax modem interaction 
ADP 	Astound Dynamite file 
ADR 	After Dark Randomizer screensaver 
ADS 	Ada source text specification (GNAT) 
AFM 	Adobe font metrics 
AF2 	ABC Flowchart file 
AF3 	ABC Flowchart file 
AI 	Adobe Illustrator drawing 
AIF, 	AIFF 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 
AIS 	ACDSee Image Sequence file 
AIS 	Velvet Studio Instruments 
AKW 	Contains all A-keywords in the RoboHELP Help project Index Designer 
	not associated with topics 
ALAW 	European telephony format audio 
ALB 	JASC Image Commander album 
ALL 	Arts & Letters Library 
AMS 	Velvert Studio music module (MOD) file 
AMS 	Extreme's Tracker module format 
ANC 	Canon Computer Pattern Maker file that is a selectable list of 
	pattern colors 
ANI 	Animated Cursor 
ANS 	ANSI text 
ANT 	saved game file in the original SimAnt for Windows 
API 	Application Program Interface file; used by Adobe Acrobat 
APR 	Lotus Approach 97 file 
APS 	Microsoft Visual C++ file 
ARC 	LH ARC (old version) compressed archive 
ARI 	Aristotle audio file 
ARJ 	Robert Jung ARJ compressed archive 
ART 	Xara Studio drawing 
ART 	Canon Crayola art file 
ART 	Clip Art file format 
ART 	Another Ray Tracer format 
ART 	Used by AOL to designate files compressed using the Johson-Grace 
	compreession algorithm 
ASA 	Microsoft Visual InterDev file 
ASC 	ASCII text 
ASC 	PGP armored encrypted file 
ASD 	WinWord AutoSave 
ASE 	Velvet Studio sample 
ASF 	Microsoft Advanced Streaming Format file 
ASM 	Assembler language source file 
ASO 	Astound Dynamite Objects 
ASP 	Active Server Page (an HTML file containing a Microsoft 
	server-processed script) 
ASP 	Procomm Plus setup and connection script 
ASP 	Astound Presentation file 
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 
ATT 	AT&T Group 4 bitmap 
AU 	Sun/NeXT/DEC/UNIX sound file 
AU 	Audio U-law (pronounced mu-law) file format 
AVB 	Inculan Anti-Virus virus infected file 
AVI 	Microsoft Audio Video Interleaved file format for Windows movie 
AVR 	Audio Visual Research file format 
AVS 	Application Visualization System format 
AWD 	FaxView document 
AWR 	Telsis file extension format for digitally stored audio.  
AXX 	ARJ compressed files from a multi-volume archive (xx = a number 
	from 01 to 99) 
A3M 	unpackaged Authorware MacIntosh file 
A4M 	unpackaged Authorware MacIntosh file 
A4P 	Authorware file packaged without runtime  
A3W 	unpackaged Authorware windows file 
A4W 	unpackaged Authorware windows file 
A5W 	unpackaged Authorware windows file 
ALAW 	European telephony format audio 
ALB 	JASC Image Commander album 
ALL 	Arts & Letters Library 
AMS 	Velvert Studio music module (MOD) file 
AMS 	Extreme's Tracker module format 
ANC 	Canon Computer Pattern Maker file that is a selectable list of 
	pattern colors 
ANI 	Animated Cursor 
ANS 	ANSI text 
ANT 	saved game file in the original SimAnt for Windows 
API 	Application Program Interface file; used by Adobe Acrobat 
APR 	Lotus Approach 97 file 
APS 	Microsoft Visual C++ file 
ARC 	LH ARC (old version) compressed archive 
ARI 	Aristotle audio file 
ARJ 	Robert Jung ARJ compressed archive 
ART 	Xara Studio drawing 
ART 	Canon Crayola art file 
ART 	Clip Art file format 
ART 	Another Ray Tracer format 
ART 	Used by AOL to designate files compressed using the Johson-Grace 
	compreession algorithm 
ASA 	Microsoft Visual InterDev file 
ASC 	ASCII text 
ASC 	PGP armored encrypted file 
ASD 	WinWord AutoSave 
ASE 	Velvet Studio sample 
ASF 	Microsoft Advanced Streaming Format file 
ASM 	Assembler language source file 
ASO 	Astound Dynamite Objects 
ASP 	Active Server Page (an HTML file containing a Microsoft 
	server-processed script) 
ASP 	Procomm Plus setup and connection script 
ASP 	Astound Presentation file 
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 
ATT 	AT&T Group 4 bitmap 
AU 	Sun/NeXT/DEC/UNIX sound file 
AU 	Audio U-law (pronounced mu-law) file format 
AVB 	Inculan Anti-Virus virus infected file 
AVI 	Microsoft Audio Video Interleaved file format for Windows movie 
AVR 	Audio Visual Research file format 
AVS 	Application Visualization System format 
AWD 	FaxView document 
AWR 	Telsis file extension format for digitally stored audio.  
AXX 	ARJ compressed files from a multi-volume archive (xx = a number 
	from 01 to 99) 
A3M 	unpackaged Authorware MacIntosh file 
A4M 	unpackaged Authorware MacIntosh file 
A4P 	Authorware file packaged without runtime  
A3W 	unpackaged Authorware windows file 
A4W 	unpackaged Authorware windows file 
A5W 	unpackaged Authorware windows file 

BAK 	Backup file 
BAS 	BASIC code 
BAT 	Batch file 
BDF 	extention for a program called West Point Bridge Designer 
BFC 	Windows 95 Briefcase document 
BG 	Backgammon for Windows game 
BGL 	from Microsoft concerning scenery files from the well known Flight 
	Simulator 
BI 	Binary file 
BIF 	GroupWise initialization file 
BIFF 	XLITE 3D file format 
BIN 	Binary file 
BK and BK$ Sometimes used to denote backup versions 
BKS 	An IBM BookManager Read bookshelf 
BMK 	A bookmark file 
BMP 	Windows or OS/2 bitmap 
BM1 	Apogee BioMenace data file 
BOOK 	Adobe FrameMaker Book 
BOX 	A mailbox in Notes 
BPL 	Borland Delphi 4 packed library 
BQY 	BrioQuery file 
BRX 	A file for browsing an index of multimedia options  
BSC 	MS Developer Studio (MSDev) browser informatio file 
BSP 	Quake map 
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 
BUN 	CakeWalk Audio Bundle file (a MIDI program) 
BW 	SGI Black and White image file 
BYU 	A file in a Movie BYU format 
B4 	Helix Nuts and Bolts file 

C 	C code 
C01 	Typhoon wave files 
CAB 	Microsoft cabinet file (program files compressed for software 
	distribution) 
CAD 	used by the drafting program "Drafix Cad">by Softdesk 
CAL 	CALS Compressed Bitmap 
CAL 	Calendar schedule data 
CAM 	Casio camera format 
CAP 	Compressed music file format 
CAS 	Comma-delimited ASCII file 
CAT 	IntelliCharge categorization file used by Quicken 
CB 	Microsoft clean boot file 
CBI 	Column binary formatted file (used in IBM mainframe systems) 
CCA 	cc:mail 
CCB 	Visual Basic Animated Button configuration 
CCF 	Multimedia Viewer configuration file used in OS/2 
CCH 	Corel Chart 
CCM 	Lotus CC:Mail "box" (for example, INBOX.CCM) 
CCO 	CyberChat data file 
CCT 	Macromedia Director Shockwave cast 
CDA 	CD Audio Track 
CDF 	Microsoft Channel Definition Format file 
CDF 	Collider Detector at Fermilab file 
CDI 	Phillips Compact Disk Interactive format 
CDR 	Core Draw drawing 
CDR 	Raw Audio-CD data 
CDT 	Corel Draw template 
CDX 	Corel Draw compressed drawing 
CDX 	Microsoft's Visual Foxpro Index 
CEL 	CIMFast Event Language file 
CER 	Certificate file (MIME x-x509-ca-cert) 
CFB 	Comptons Multimedia file 
CFG 	Configuration file 
CFM 	Cold Fusion template files 
CGI 	Common Gateway Interface script file 
CGM 	Computer Graphics Metafile 
CH 	OS/2 configuration file 
CHK 	File fragments saved by Windows Disk Defragmenter or ScanDisk 
CHM 	Compiled HTML file 
CHR 	Character Sets (Font files) 
CHP 	Ventura Publisher chapter 
CHT 	ChartViewer file 
CHT 	Harvard Graphics vector file 
CIL 	Clip Gallery download package 
CIM 	Sim City 200 file 
CIN 	OS/2 change control file that tracks changes to an INI file 
CK1 	iD/Apogee Commander Keen 1 data file 
CK2 	iD/Apogee Commander Keen 2 data file 
CK3 	iD/Apogee Commander Keen 3 data file 
CK4 	iD/Apogee Commander Keen 4 data file 
CK5 	iD/Apogee Commander Keen 5 data file 
CK6 	iD/Apogee Commander Keen 6 data file 
CLASS 	Java class 
CLL 	Crick Software Clicker File 
CLP 	Windows Clipboard file 
CLS 	Visual Basic Class Module 
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 
CMF 	Corel Metafile 
CMP 	JPEG Bitmap 
CMP 	Address document 
CMV 	Corel Move animation 
CMX 	Corel Presentation Exchange image 
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 
COB 	trueSpace2 object 
COD 	Microsoft C compiler output as displayable machine 
	language/assembler with original C as comments 
COM 	Command file (program) 
CPD 	Corel PrintOffice file (drawing) 
CPD 	Fax Cover document 
CPE 	Fax Cover document 
CPI 	Microsoft MS-DOS code page information file 
CPL 	Control Panel extension 
CPL 	Corel colour palette 
CPO 	Corel Print House file 
CPP 	C++ code 
CPR 	Corel Presents Presentation 
CPT 	Corel Photo-Paint image 
CPX 	Corel Presentation Exchange Compressed drawing 
CRD 	Cardfile file 
CRP 	Corel Presents Run-Time Presentation 
CRT 	Certificate file 
CSC 	Corel Script 
CSP 	PC Emcee On-Screen image 
CSS 	Cascading Style Sheet file (MIME) 
CST 	Macromedia Director "Cast" (resource) file 
CSV 	Comma-separated values file 
CT 	Scitex CT Bitmap 
CT 	A graphic file associated with the Paint Shop Pro Graphic Editor 
CTL 	Used in general to mean a file containing control information. 
	FAXWorks uses it to keep information about each fax sent and received. 
CUE 	Microsoft Cue Cards data 
CUR 	Windows Cursor 
CUT 	Dr Halo bitmap 
CV 	Corel Versions archive 
CV 	Microsoft CodeView information screen 
CWK 	Claris Works data file 
CWS 	Claris Works template 
CXT 	Macromedia Director protected (not editable) "Cast" (resource) file 
CXX 	C++ source code file 

DAT 	Data file 
DAT 	WordPerfect Merge Data 
DAT 	Extension used for some MPEG formats 
DB 	Borderland's Paradox 7 tables 
DBC 	Microsoft's Visual Foxpro Database container 
DBF 	Aston-Tate dBASE database 
DBX 	DataBeam image 
DBX 	Microsoft's Visual Foxpro Table 
DCM 	DCM modle format 
DCR 	Shockwave file 
DCS 	Desktop Color Separation file 
DCT 	Microsoft's Visual Foxpro Database container 
DCU 	Delphi compiled unit file 
DCX 	Microsoft's Visual Foxpro Database container 
DCX 	Fax image (based on PCX) 
DCX 	Macros 
DC5 	DataCAD Drawing files 
DDF 	BTRIEVE database 
DDIF 	Digital Equipment or Compaq format. Used for storing images and 
	their word processing documents 
DEF 	SmartWare II data file 
DEF 	C++ Definition 
DEFI 	Oracle 7 de-install script 
DEM 	A file with USGS standards for Digital Elevation Models 
DER 	Certificate file 
DEWF 	Macintosh SoundCap/SoundEdit recorded instrument format 
DGN 	Microstation95 CAD drawing file 
DIB 	Device-Independent Bitmap 
DIC 	Dictionary 
DIF 	Data Interchange Format spreadsheet 
DIG 	Digilink format 
DIG 	Sound Designer I audio file 
DIR 	Macromedia Director file 
DIZ 	Description file 
DLG 	C++ Dialogue Script 
DLS 	DownLoadable Sound 
DLL 	Dynamic-Link Library 
DMF 	X-Trakker music module (MOD) file 
DOC 	FrameMaker or FrameBuilder document 
DOC 	WordStar document 
DOC 	WordPerfect document 
DOC 	Microsoft Word document 
DOC 	A DisplayWrite document 
DOT 	Microsoft Word document Template 
DPL 	Borland Delphi 3 packed library 
DPR 	Borland Delphi project header file 
DRAW 	Acorn's object-based vector image file 
DRV 	Driver 
DRW 	Micrografx Designer/Draw 
DSF 	Micrografx Designer v7.x 
DSG 	DooM saved game 
DSM 	Dynamic Studio music module (MOD) file 
DSP 	Microsoft Developer Studio project 
DSQ 	Corel QUERY file 
DST 	Embroidery machines graphics file 
DSW 	Microsoft Developer Studio workspace 
DTD 	SGML Document Type Definition (DTD) file 
DTED 	Digital terrain elevation data (geographic data format) 
DTM 	DigiTrakker module 
DTF 	Symantec Q&A relational database data file 
DUN 	Microsoft Dial-up Networking Export file 
DV 	Digital video file (MIME) 
DWD 	DiamondWare digitized file 
DWG 	Autocad Drawing files 
DWG 	AutoCAD drawing, or older Generic CADD drawing format 
DXF 	Drawing Interchange (eXchange) format,a text representation of 
	the binary DWG format 
DXF 	Data Exchange File 
DXR 	Macromedia Director protected (not editable) movie file 

EDA 	Ensoniq ASR disk image 
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 
EDV 	Ensoniq VFX-SD disk image 
EFA 	Ensoniq ASR file 
EFE 	Ensoniq EPS file 
EFK 	Ensoniq KT file 
EFQ 	Ensoniq SQ1/SQ2/KS32 file 
EFS 	Ensoniq SQ80 file 
EFV 	Ensoniq VFX-SD file 
EMD 	ABT Extended MoDule 
EMF 	Enhanced Windows Metafile 
EML 	Microsoft Outlook Express mail message (MIME RFC 822) 
ENC 	Encore file 
ENFF 	Neutral File Format extension 
EPHTML 	Enhanced Perl-parsed HTML 
EPS 	Encapsulated PostScript image 
ER1 	ERWin file 
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 
ESPF 	Encapsulated PostScript Files 
ESPS 	ESPS audio files 
EUI 	Ensoniq ESP family compacted disk image 
EVY 	Envoy document 
EWL 	Microsoft Encarta document 
EXC 	Microsoft Word Exclusion Dictionary 
EXE 	Executable file (program) 

F 	FORTRAN file 
F2R 	Farandoyle linear module format 
F3R 	Farandoyle blocked linear module format 
F77 	FORTRAN file 
F90 	FORTRAN file 
FAR 	Farandole Composer music module (MOD) file 
FAV 	Microsoft Outlook navigation bar 
FAX 	FAX Type image 
FBK 	Navison Financials Backup 
FCD 	Virtual CDROM 
FDB 	Navison Financials Database 
FDF 	Adobe Acrobat Forms Document file 
FEM 	CADRE Finite Element Mesh file 
FFA 	MS fast find file 
FFF 	GUS PnP bank file format 
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 
FIF 	Fractal image file 
FIG 	A file format used by REND386/AVRIL 
FITS 	CCD camera image 
FITS 	Flexible Image Transport System 
FLA 	Macromidia Flash movie 
FLC 	AutoDesk FLIC animation 
FLF 	Corel Paradox Delived form 
FLF 	Navison Financials License file 
FLI 	AutoDesk FLIC animation 
FLT 	Corel filter 
FLF 	An OS/2 driver file 
FLT 	StarTrekker music module (MOD) file 
FLT 	A file format use in MulitGen Inc.'s Open Flight 
FM 	Adobe FrameMaker Document 
FMB 	Oracle binary source code for form, version 4.0 and later 
FML 	File Mirror List (GetRight) 
FMT 	Oracle text format of form, version 4.0 and later 
FMT 	Microsoft Schedule+ print file 
FMX 	Oracle executable form, version 4.0 and later 
FND 	Microsoft Explorer Saved Search file (Find applet) 
FNG 	Font group file (Font Navigator) 
FNK 	FunkTracker module format 
FOG 	Fontographer font 
FON 	System font 
FOR 	FORTRAN file 
FOT 	Font-related file 
FP 	FileMaker Pro file 
FP1 	Flying Pigs for Windows data file 
FP3 	FileMaker Pro file 
FPT 	FileMaker Pro file 
FPT 	Microsoft FoxPro memo fields 
FPX 	FlashPix bitmap 
FRM 	Form 
FRM 	FrameMaker or FrameBuilder document 
FRM 	Oracle executable form version 3.0 and earlier 
FRM 	Visual Basic form 
FRM 	WordPerfect Merge form 
FRM 	Datacad Symbol Report file 
FRX 	Visual Basic form stash file 
FRX 	Microsoft FoxPro report file 
FRT 	Mirosoft FoxPro report file 
FSF 	fPrint Audit Tool file format 
FSL 	Borderland's Paradox 7 forms 
FSL 	Corel Paradox Saved form 
FSM 	Farandoyle Sample format 
FT 	Lotus Notes Full Text index 
FTG 	Full-text Search Group file resulting from using Find in the Windows 
	Help system. Can be erased; will be rebuilt when needed. 
FTS 	Full-Text Search index file resulting from using Find in the Windows 
	help system 
FW2	Framework II 
FW3	Framework III file 
FW4	Framework IV file 
FXP	Microsoft FoxPro compiled source file 
FZB	Casio FZ-1 Bank dump 
FZF	Casio FZ-1 Full dump 
FZV	Casio FZ-1 Voice dump 

G721	Raw CCITT G.721 $bit ADPCM format data 
G723	Raw CCITT G.723 3 or 5bit ADPCM format data 
GAL	Corel Multimedia Manager album 
GCD	Generic (TM) CADD drawing (later versions) 
GCP	Ground Control Point file used in image processing of remote sensing 
	data often to form map projections. CHIPS (CopenHagen Image Processing 
	System) uses these files. 
GDB	InterBase database file 
GDM	Bells, whistles, and sound boards module format 
GED	GEDCOM genealogical data file, a popular format for recording and 
	exchanging genealogical data 
GED	Graphic Environment Document (drawing) 
GEM	GEM metafile 
GEN	Ventura-Generated text file 
GetRight GetRight Unfinished-Download file 
GFC	Patton&Patton Flowcharting 4 flowchart file 
GFI	Genigraphics Graphics Link presentation 
GFX	Genigraphics Graphics Link presentation 
GID	Windows 95 global index file (containing help status) 
GIF	CompuServe bitmap 
GIM	Genigraphics Graphics Link presentation 
GIX	Genigraphics Graphics Link presentation 
GKH	Ensoniq EPS family disk image file 
GKS	Gravis GripKey document 
GL	An animation format 
GNA	Genigraphics Graphics Link presentation 
GNT	Generated Code, an executable code in a Micro Focus proprietary format 
GNX	Genigraphics Graphics Link presentation 
GRA	Microsoft Graph 
GRD	Grid file, used in image processing of remote sensing data often to 
	form map projections. CHIPS (CopenHagen Image Processing System) 
	uses these files 
GRF	Grapher (Golden Software) graph file 
GRP	Program Manager Group 
GSM	Raw GSM 6.10 audio stream 
GSM	Raw 'byte aligned' GSM 6.10 audio stream 
GSM	US Robotics voice modums GSM w.o. header/VoiceGuide/RapidComm 
GSM	US Robotics voice modums GSM w. header/QuickLink 
GTK	Graoumftracker (old) music module (MOD) file 
GT2	Graoumftracker (new) music module (MOD) file 
GWX	Genigraphics Graphics Link presentation 
GWZ	Genigraphics Graphics Link presentation 
GZ	Unix Gzip compressed file 

H	C program header 
HCOM	Sound Tools HCOM format 
HDF	A file in Hierarchical Data Format 
HED	HighEdit document 
HEL	Microsoft Hellbender saved game 
HEX	Macintosh BinHex 2.0 file 
HGL	HP Graphics Language drawing 
HH	Map file. Contains topic IDs and map numbers for each of the topics 
	in a Help system. Allows the running application to send the user 
	the appropriate context-sensitive help topic 
HLP	Help file 
HLP	DataCAD Windows Help file 
HOG	Lucas Arts Dark Forces WAD file 
HPJ	Visual Basic Help Project 
HPP	C++ program header 
HQX	Macintosh BinHex 4.0 file 
HST	History file 
HT	HyperTerminal 
HTM	Hypertext document 
HTML	Hypertext document 
HTT	Microsoft Hypertext Template 
HTX	Extended HTML template 
HXM	Descent2 HAM file extension 

ICA	Citrix file 
ICB	Targa bitmap 
ICC	Kodak printer format 
ICL	Icon Library file (an industry standard) 
ICM	Image Color Matching profile file 
ICO	Windows Icon 
IDB	MSDev 'intermediate' file 
IDD	MIDI Instrument Definition 
IDF	MIDI Instrument Definition (Windows 95 required file) 
IDQ	Internet Data Query file 
IDX	Microsoft FoxPro relational database index file 
IDX	Symantec Q&A relational database index file 
IDX	Microsoft Outlook Express file 
IFF	Interchange Format Files, Amiga ILBM 
IGES	Initial Graphics Exchange Specification file 
IGF	Inset Systems metafile 
IIF	QuickBooks for Windows interchange file 
ILBM	A bitmap (graphic image) file 
IMA	WinImage file 
IMG	GEM image 
INC	Assembler language or Active Server include file 
INF	Information file 
INI	Initialization file 
INI	MWave DSP synth's mwsynth.ini GM-setup 
INI	Gravis UltraSound bank setup 
INP	Oracle source code for form, version 3.0 and earlier 
INRS	INRS-Telecommunications audio 
INS	InstallShield install script 
INS	X-Internet sign-up file 
INS	Ensoniq EPS family instrument 
INS	Sample Cell/II MAC/PC instruments 
INT	Intermediate Code, an executable code produced when a source program 
	is syntax-checked 
IOF	Findit document 
IQY	Microsoft Internet Inquiry file 
ISO	Lists the files on a CD-ROM; based on the ISO 9660 CD-ROM file system 
	standard 
ISP	X-Internet sign-up file 
IST	Digitaltracker instrument file 
ISU	InstallShield uninstall script 
IT	Impulse Tracker music module (MOD) file 
ITI	Impulse Tracker instrument 
ITS	Impulse Tracker sample 
ITS	Internet document set (possibly a Microsoft file) 
IV	A file format use in Open Inventor 
IW	Idlewild screensaver 

J62	Ricoh camera format 
JAR	Java ARchive file (a compressed file for applets and related files) 
JAVA	Java source code 
JBF	Paint Shop Pro image browser file 
JFF	JPEG file 
JIF	JPEG file 
JFIF	JPEG file 
JMP	SAS JMPDiscovery chart-to-statistics file 
JN1	Epic MegaGames Jill of the Jungle data file 
JPE	JPEG file 
JPEG	JPEG compressed bitmap 
JPG	JPEG bitmap 
JS	JavaScript source code 
JSP	A HTML page containing a reference to a Java servlet 
JTF	JPEG bitmap 

K25	Kurzweil 2500 sample 
KAR	Karaoke MIDI file (text+MIDI) 
KDC	Kodak Photo-Enhancer 
KEY	DataCAD Icon toolbar file 
KFX	KoFax Group 4 image 
KIZ	Kodak digital postcard files 
KKW	Contains all K-keywords in the RoboHELP Help project Index Designer 
	not associated with topics 
KMP	Korg Trinity KeyMaP file 
KQP	Konica camera native files 
KR1	Kurzweil 2000 sample (multi-floppy) 
KRZ	Kurzweil 2000 sample 
KSF	Korg Trinity Sample File 
KYE	Kye game data 

LBM	Deluxe Paint bitmap 
LBT	Microsoft FoxPro labels 
LBX	Microsoft FoxPro labels 
LDB	Microsoft Access lock file 
LDL	Corel Paradox Delivered library  
LEG	Legacy document 
LES	Logitech Entertainment system game profiles (same as REG file) 
LFT	3D Studio (DOS) loft file 
LHA	Alternate file suffix for LZH 
LIB	Library 
LIN	DataCAD Line type file 
LIS	Output file produced by a Structured Query Reporting (SQR) program 
LLX	Laplink Exchange Agent 
LNK	Windows shortcut file 
LOG	Log file 
LPD	Helix Nuts and Bolts file 
LRC	Intel Video Phone file 
LSL	Corel Paradox Saved library 
LSP	AutoLISP, CommonLISP, and othe LISP language files 
LST	List file 
LU	ThoughtWing Library Unit file 
LVL	Parallax Software's Miner Descent/D2 Level Extension 
LWLO	Lightwave Layered Object file 
LWOB	Lightwave Object file 
LWP	Lotus Wordpro 96/97 file 
LWSC	Lightwave Scene file 
LYR	DataCAD Layer file 
LZH	LH ARC compressed archive 
LZS	Skyroads data file 

M1V	MPEG-related file (MIME type 'mpeg') 
M3D	Corel Motion 3D animation 
M3U	MPEG URL (MIME audio file) 
MAT	Matlab variables binary file 
MAC	MacPaint image 
MAD	Microsoft Access module 
MAF	Microsoft Access Form 
MAG	A graphics file format found in some Japanese files 
MAGIC	Magic Mail Monitor configuration file 
MAK	Visual Basic or MS Visual C++ Project 
MAM	Microsoft Access Macro 
MAN	Unix Manual page output 
MAP	Map file 
MAP	Duke Nukem 3D WAD game file 
MAQ	Microsoft Access Query 
MAR	Microsoft Access Report 
MAS	Lotus Freelance Graphics Smartmaster file 
MAT	Microsoft Access Table 
MAUD	MAUD sample format 
MAX	A file format which repesents a scene in KINETIX's 3D Studio MAX 
MAX	Paperport file 
MAX	OrCAD layout file 
MAZ	Hover maze data 
MAZ	A file format use by Division's dVS/dVISE 
MB1	Apogee Monster Bash data file 
MBOX	Berkeley Unix mailbox format 
MBX	Extension Microsoft Outlook adds to saved email, Eudora mailboxes 
MCC	Dialer10 calling card 
MCC	Dialer10 calling card 
MCR	DataCAD Keyboard macro file 
MCW	Microsoft Word for Macintosh document 
MDA	Microsoft Access add-in 
MDA	Microsoft Access workgroup for version 2 
MDB	Microsoft Access database 
MDE	Microsoft Access MDE file 
MDL	Digital Tracker music module (MOD) file 
MDL	Quake model file 
MDN	Microsoft Access blank database template 
MDW	Microsoft Access Workgroup 
MDZ	Microsoft Access wizard template 
MED	Music Editor, OctaMED music module (MOD) file 
MER	Format for interchanging spreadsheet/database data; recognized by 
	Filemaker, Excel, and others 
MET	Presentation Manager metafile 
MGF	A file in a Materials and Geometry Format 
MHTM	MHTML document (MIME) 
MHTML	MHTML document (MIME) 
MI	Miscellaneous 
MIC	Microsoft Image Composer file 
MID	MIDI music 
MIF	Adobe FrameMaker Interchange Format 
MIFF	Machine Independent Format File 
MIM	A multipart file in the Multi-Purpose Internet Mail Extensions (MIME) 
	format; often created as the result of sending e-mail with attachments 
	in AOL. The files in a multipart MIM file can be "opened" (unarchived 
	and separated into individual files) using Winzip or a similar program. 
MIME	See MIM. 
MLI	A file in 3D Studio's Material-Library format 
MME	A multipart file in the Multi-Purpose Internet Mail Extensions (MIME) 
	format; often created as the result of sending e-mail with attachments 
	in AOL. The files in a multipart MME file can be "opened" (unarchived 
	and separated into individual files) using Winzip or a similar program. 
MMF	Meal Master Format, a recipe catologing format 
MMF	Microsoft Mail File 
MMM	Microsoft Multimedia Movie 
MMP	Mindmapor MindManager file 
MN2	Descent2 Mission File 
MND	, MNI Mandelbrot for Windows 
MNG	Multi-image Network Graphics 
MNT	Microsoft FoxPro menus 
MNX	Microsoft FoxPro menus 
MOD	FastTracker, StarTrekker, Noise Tracker (etc.) music module file 
MOD	Microsoft Multiplan spreadsheet 
MOD	Amiga/PC tracker module 
MOV	QuickTime for Windows movie 
MP2	MPEG Audio Layer 2 
MP3	MPEG Audio Layer 3 (AC3) 
MPA	MPEG-related file (MIME type 'mpeg') 
MPE	MPEG animation 
MPG	MPEG animation 
MPP	Microsoft Project file 
MPP	CAD drawing file format 
MPR	Microsoft FoxPro menus (compiled) 
MP2	MPEG Audio Layer 2 file (MIME video file) 
MP3	MPEG Audio Layer 3 (AC3) file 
MRI	MRI Scan 
MSA	Magic Shadow Archive 
MSDL	Manchesters Scene Description Language 
MSG	Microsoft Mail message 
MSN	Microsoft Network document 
MSN	Descent Mission File 
MSP	Microsoft Paint bitmap 
MTM	MultiTracker music module (MOD) file 
MUL	Online game called Ultima online 
MUS	Music 
MUS10	Mus10 audio 
MVB	Microsoft Multimedia Viewer file 
MWP	Lotus Wordpro 97 Smartmaster file 

NAN	Nanoscope files (Raw Grayscale) 
NAP	NAP Metafile Vector image 
netCDF	network Common Data Form 
NCB	Microsoft Developer Studio file 
NCD	Norton Change Directory 
NCF	Netware Command File 
NCF	Lotus Notes internal clipboard 
NDO	3D low-polygon modeler, Nendo 
NFF	Neutral File Format 
NIL	Norton Icon Library file (EasyIcons-compatible) 
NIST	NIST Sphere audio 
NLB	Oracle 7 data 
NLM	Netware Loadable Module 
NLU	Norton Live Update E-Mail Trigger file 
NSF	Lotus Notes database 
NS2	Lotus Notes database (version 2) 
NST	Noise Tracker music module (MOD) file 
NTF	Lotus Notes database template 
NWC	Noteworthy Composer song file 
NWS	Microsoft OutlookExpress news message (MIME RFC822) 

O01	Typhoon voice file 
OBD	Microsoft Office binder template 
OBD	Microsoft Office Binder 
OBJ	Object file 
OBZ	Microsoft Office Binder Wizard 
OCX	Microsoft Object Linking and Embedding custom control 
ODS	Microsoft Outlook Express mailbox file (?) 
OFF	3D mesh Object File Format 
OFN	Microsoft Office FileNew file 
OFT	Microsoft Outlook template 
OKT	Oktalyzer music module (MOD) file 
OLB	OLE Object Library 
OLE	OLE object 
OOGL	Object Oriented Graphics Library 
OPL	Organiser Programming Language source file - Psion/Symbian 
OPO	OPL output executable file 
OPT	Microsoft Developer Studio file 
OPX	OPL extension DLL 
ORC	Oracle 7 script 
ORG	Lotus Organiser file 
OR2	Lotus Organiser 2 file 
OR3	Lotus Organiser 97 file 
ORA	Oracle 7 configuration 
OSS	Microsoft Office Search file 
OST	Microsoft Exchange/Outlook Offline file 
OTL	Super NoteTab template file (Fookes) 

P10	Tektronix Plot 10 drawing 
P65	Pagemaker 6.5 file 
P7C	Digital ID file (MIME) 
PAB	Microsoft Personal Address Book 
PAC	SB Studio II package 
PAK	Quake WAD file 
PAL	A compressed file 
PAS	Pascal source code (Borland) 
PAT	DataCAD Hatch pattern file 
PAT	Corel Draw pattern 
PAT	Advanced Gravis Ultrasound/Forte tech. Patch 
PBD	PowerBuilder Dynamic library, an alternative to a native DLL 
PBF	Turtle Beach Pinnacle Bank File 
PBK	Microsoft Phonebook 
PBL	PowerBuilder Library used in the PowerBuilder development environment 
PBM	Portable bitmap 
PBR	PowerBuilder Resource 
PCD	Kodak Photo-CD image 
PCD	P-Code compiled test scripts as in Microsoft Tst and Microsoft 
	Visual Test 
PCE	Maps Eudora mailbox names to DOS filenames 
PCL	Hewlett-Packard Printer Control Language file (printer-ready bitmap) 
PCM	Audio file format 
PCM	OKI MSM6376 synth chip PCM format 
PCP	Symantec Live Update Pro file 
PCS	PICS animation 
PCT	Macintosh PICT drawing 
PCX	ZSoft PC Paintbrush bitmap 
PDF	Adobe Acrobat Portable Document Format or Netware Printer Definition 
	File 
PDB	3Com Palmpilot database file 
PDF	Package Definition File from Microsoft Systems Management Server 
	Verifies installed packages when performing an inventory scan of 
	a client 
PDQ	Patton&Patton Flowcharting PDQ Lite file 
PF	Aladdin Systems Private Files encrypted file 
PFA	Type 1 font (ASCII) 
PFB	Type 1 font (binary) 
PFC	PF Component 
PFM	Printer Font Metrics 
PGL	HP Plotter drawing 
PGM	Portable Graymap (bitmap) 
PGP	PGP encrypted file 
PH	Temporary file generated by Microsoft Help Compiler 
PHTML	Perl-parsed HTML 
PIC	PC Paint bitmap 
PIC	Lotus picture 
PIC	Macintosh PICT drawing 
PICT	Mac PICT image file 
PIF	Program Information File 
PIF	IBM PIF drawing 
PIG	Lucas Arts Dark Forces WAD file 
PIN	Epic Pinball data file 
PIN	Epic Pinball data file 
PIX	Inset Systems bitmap 
PJ	MKS Source Integrity file 
PJX	Microsoft's Visual Foxpro Project 
PJT	Microsoft's Visual Foxpro Project 
PKG	Microsoft Developer Studio application extension (similar to a DLL 
	file) 
PKR	PGP Public Keyring 
PL	Perl program 
PLG	A file format use by REND386/AVRIL 
PLI	Oracle 7 data description 
PLM	DisorderTracker2 module 
PLS	DisorderTracker2 sample 
PLS	MPEG PLayList file (used by WinAmp) 
PLT	HPGL Plotter drawing 
PLT	AutoCAD Plot drawing 
PLT	Gerber sign-making software 
PM5	Pagemaker 5.0 file 
PM6	Pagemaker 6.0 file 
PNG	Portable Network Graphics bitmap 
PNG	Paint Shop Pro Browser catalogue 
PNT	MacPaint graphic file 
PNTG	Same as PNT file 
POG	Descent2 PIG file extension 
POT	Microsoft PowerPoint Template 
POV	Persistence of Vision ray-tracer 
PP4	Picture Publisher 4 bitmap 
PPA	Microsoft PowerPoint Add-in 
PPF	Turtle Beach Pinnacle Program File 
PPM	Portable Pixelmap bitmap 
PPP	Parson Power Publisher 
PPP	Serif PagePlus desktop publishing default output 
PPS	Microsoft PowerPoint slide show 
PPS	Paint Shop Pro image 
PPT	Microsoft PowerPoint presentation 
PRC	3Com Palmpilot resource (text or program) file 
PRE	Lotus Freelance presentation 
PRF	Windows system file 
PRF	Macromedia Director settings file 
PRG	dBase, Clipper, and FoxPro program source files 
PRG	WAVmaker program 
PRJ	3d Studio (DOS) project file 
PRN	Print Table (space delimited text) 
PRN	DataCAD Windows Printer file 
PRS	Harvard Graphics for Windows presentation 
PRT	A print-formatted file 
PRV	A PsiMail Internet provider template file 
PRZ	Lotus Freelance Graphics 97 file 
PS	Postscript-formatted file (a Postscript printer-ready file) 
PSB	Pinnacle Sound Bank 
PSD	Adobe Photoshop bitmap 
PSI	PSION a-law audio 
PSM	Protracker Studio Module format 
PSM	Sound data for Epic's games 
PST	Microsoft Outlook Personal Folder File 
PTM	Polytracker music module (MOD) file 
PUB	Ventura Publisher publication 
PUB	Microsoft Publisher document 
PWD	Microsoft Pocket Word document 
PWL	Windows 95 password list file 
PWP	Photoworks image file (a roll of file that can be viewed using 
	Photoworks) 
PWZ	Microsoft PowerPoint Wizard 
PXL	Microsoft Pocket Excel spreadsheet 
PY	Save emessages from Yahoo 

QAD	PF QuickArt Document 
QBW	QuickBooks for Windows file 
QDT	Quick Books data file from the Quicken UK Accountancy/Tax/Invoice 
	program 
QD3D	Apple's QuickDraw 3D Metafile format 
QFL	FAMILY LAWYER document 
QIC	Microsoft Backup file 
QIF	QuickTime-related image (MIME) 
QIF	Quicken Import File 
QLB	Quick Library 
QM	Quality Motion file 
QRY	Microsoft Query 
QST	Quake Spy Tab file 
QT	QuickTime Movie 
QTI	QuickTime-related image 
QTIF	QuickTime-related image 
QTM	QuickTime Movie 
QTP	QuickTime Preferences file 
QTS	MacPICT image file 
QTS	QuickTime-related image 
QTX	QuickTime-related image 
QW	Symantec Q&A Write program file 
QXD	Quark XPress file 

R	Pegasus Mail resource file 
RA	Real Audio sound 
RAM	RealAudio metafile  
RAR	RAR compressed archive (Eugene Roshall's format) 
RAS	Sun Raster Images bitmap 
RAW	Raw File Format (bitmap) 
RAW	Raw signed PCM data 
RBH	Maintained by RoboHELP, the RBH file adds to the information 
	contained in the Help project file 
RDF	Resource Description Framework file (related to XML and metadata) 
RDL	Descent Registered Level 
REC	Recorder macro 
REC	RapidComm voice file 
REG	Registration file 
RES	Microsoft Visual C++ Resource 
RGB	SGI Silicon Graphics RGB files 
RFT	Revisable Form Text (part of IBM's DCA or Document Content 
	Architecture) 
RLE	Run-Length Encoded bitmap 
RL2	Descent2 Registered Level 
RM	Real Audio video file 
RMD	Microsoft RegMaid document 
RMF	Rich Map Format (used by 3-D game editors to store a map) 
RMI	MIDI music 
ROV	Rescue Rover data file 
RPM	RedHat Package Manager package (for Linux) 
RPM	RedHat Package Manager package (for Linux) 
RPT	Microsoft Visual Basic Crystal Reports file 
RRS	save file for the ace game Road Rash 
RSL	Borderland's Paradox 7 reports 
RTF	Rich Text Format document 
RTM	Real Tracker music module (MOD) file 
RTK	Used by RoboHELP to simulate the search feature of Windows help 
RTS	RealAudio's RTSL document 
RTS	RoboHELP to speed complex operations 
RUL	Extension used in InstallShield 
RVP	Microsoft Scan Configuration file (MIME) 
RXX	RAR compressed files from a multi-volume archive (xx = a number 
	from 01 to 99) 

S	Assembler source code 
S3I	Scream Tracker v3 instrument 
S3M	Sound module file for ScreamTracker v3 
SAM	Ami Professional document 
SAM	Signed 8bit sample data 
SAV	Saved game file 
SB	Raw Signed Byte (8bit) data 
SBK	Creative Labs Soundfont 1.0 Bank file (Soundblaster)/EMU SoundFont 
	v1.x Bank files 
SBL	Shockwave Flash object 
SC2	Microsoft Schedule+ 7 file format 
SC2	SAS catalog (Windows 95/NT, OS/2, Mac) 
SCC	Microsoft Source Safe file 
SCD	Matrix/Imapro SCODL slide image 
SCD	Microsoft Schedule+ 7 
SCF	Windows Explorer command file 
SCH	Microsoft Schedule+ 1 
SCI	ScanVec Inspire Native file format 
SCN	trueSpace2 scene 
SCP	Dial-Up Networking Script 
SCR	Windows screensaver 
SCR	Fax image 
SCT	SAS catalog (Dos) 
SCT	Scitex CT bitmap 
SCT	Microsoft FoxPro forms 
SCT01	SAS catalog (Unix) 
SCV	ScanVec CASmate Native file format 
SCX	Microsoft FoxPro forms 
SD	Sound Designer I audio 
SD2	Sound Designer 2 flattened file/data fork 
SD2	SAS database (Windows 95/NT OS/2, Mac) 
SDF	System Data File Format - legacy Unisys (Sperry) format 
SDK	Roland S-series floppy disk image 
SDL	SmartDraw library 
SDR	SmartDraw drawing 
SDS	Raw Midi Sample Dump Standard file 
SDT	SmartDraw template 
SDV	Semicolon Divided Values file 
SDW	Lotus WordPro graphic file 
SDW	Raw Signed DWord (32bit) data 
SDX	Midi Sample Dump Standard files compacted by SDX 
SEA	Self-expanding archive (used by Stuffit for Mac files and possibly 
	by others) 
SEP	Tagged Image File Format (TIFF) bitmap 
SES	Cood Edit Session file (common digital audio editor file ) 
SF	IRCAM SoundFile format 
SF2	Emu SoundFont v2.0 file 
SFD	SoundStage Sound File Data 
SFI	SoundStage Sound File Info 
SFR	Sonic Foundry Sample Resource 
SFW	Seattle Film Works (Mangled JPEG) 
SFX	RAR self-extracting archive 
SF2	Creative Labs Soundfont 2.0 Bank file (Soundblaster) 
SGML	Standard Generalized Markup Language 
SHB	Corel Show presentation 
SHB	Document shortcut file 
SHG	Hotspot bitmap 
SHP	3D Studio (DOS) shapes file 
SHP	File format used by some programs for 3D modeling of multipart 
	interactive triangle models 
SHS	Shell scrap file 
SHW	Corel Show presentation 
SIG	Signature file 
SHTML	HTML file containing Server Side Includes (SSI) 
SIT	Stuffit archive of Mac files 
SIZ	Oracle 7 configuration 
SKA	PGP secret Keyring 
SKL	Macromedia Director resource file 
SL	PACT's Save Layout extension 
SLB	AutoDesk Slide Library File Format 
SLD	AutoDesk Slide File Format 
SLK	Symbolic Link (SYLK) spreadsheet 
SM3	DataCAD Symbol file 
SMP	Samplevision format 
SMP	Ad Lib Gold Sample 
SND	NeXT sound 
SND	Mac Sound Resource 
SND	Raw unsigned PCM data 
SND	AKAI MPC-series sample 
SNDR	Sounder sound file 
SNDT	Sndtool sound file 
SOU	SB Studio II sound 
SPD	Speach Data file 
SPL	Shockwave Flash Object 
SPL	Digitracker Sample 
SPPACK	SPPack sound sample 
SPRITE	Acorn's bitmap format 
SQC	Structured Query Language (SQR) common code file 
SQL	Informix SQL queries 
SQL	Generally used by database products as an extension for SQL queries 
	(scripts, text, or binary) 
SQR	Structured Query Language (SQR) program file 
SSD01	SAS data sets (Unix) 
SSD	SAS database (Dos) 
STM	Shorter suffix for .shtml, an HTML file containing a Server Side 
	Include (SSI) 
STM	Scream Tracker v2 music module (MOD) file 
ST	Atari ST disk image 
STR	Sceensaver exetension 
STY	Ventura Publisher style sheet 
SVX	Amiga 8SVX sound 
SVX	Interchange file format, 8SVX/16SV 
SW	Raw signed Word (16bit) data 
SWA	Shockwave audio file in Macromedia Director (an MP3 file) 
SWF	Shockwave Flash object 
SWP	DataCAD Swap file 
SYS	System file 
SYW	Yamaha SY-series wave files 

TAB	Guitar Tablature file 
TAR	Tape Archive 
TAZ	Unix Gzip/Tape Archive 
TBK	Asymetrix Toolbook interactive multimedia files 
TCL	Script in the TCL/TK Language 
TDB	Thumbs Plus database 
TDDD	A file format use by the Imagine & Turbo Silver ray-tracers 
TEX	Texture file 
TGA	Targa bitmap 
TGZ	Unix Gzip/Tape Archive 
THEME	Windows 95 Desktop Theme 
THN	Graphics Workshop for Windows thumbnail 
TIF	Tag Image File Format (TIFF) bitmap 
TIFF	Tag Image File Format (TIFF) bitmap 
TIG	Tiger file, used by US government to distribute maps 
TLB	OLE Type Library 
TLE	Two-Line Element set (NASA) 
TMP	Windows temporary file 
TOC	Table of contents of Eudora mailboxes 
TOL	Kodak photoenhancer 
TOS	The Operation System for Atari line of 16/32 and 32/32 computers 
TPL	CakeWalk Audio Template file 
TPL	DataCAD Template file  
TPP	Teleport Pro Project 
TRK	Kermit scrpit file 
TRM	Terminal file 
TRN	MKS Source Integrity project usage log 
TTF	TrueType font 
TTK	Corel Catalyst Translation Tool Kit 
TWF	TabWorks file 
TWW	Tagwrite Template 
TX8	MS-DOS text 
TXB	Descent/D2 Encoded Briefing File 
TXT	ASCII text-formatted audio data 
TXW	Yamaha TX16W wave files 
TZ	Old compression format file 
T2T	Sonata CAD modelling software file 

UB	Raw unsigned byte (8-bit) data 
UDF	Windows NT Uniqueness Database File 
UDW	Raw unsigned doubleword (32-bit) data 
ULAW	US telephony format (CCITT G.711) audio 
ULT	Ultratracker music module (MOD) file 
UNI	MikMod UniMod formatted file 
URL	Internet shortcut file 
USE	MKS Source Integrity file 
UU	UU-encoded file 
UUE	UU-encoded file 
UW	Raw unsigned word (16-bit) data 
UWF	UltraTracker Wave file 

V8	Covox 8-bit audio file 
VAP	Annotated speech 
VBA	VBase file 
VBP	Visual Basic Project 
VBW	Microsoft Visual Basic workspace 
VBX	Visual Basic custom control 
VCE	Natural MicroSystems (NMS) unformatted voice file (used by Cool Edit) 
VCF	Virtual card file (Netscape) 
VCF	Vevi configuration file; defines objects for use with Sense8's 
	WorldToolKit 
VCT	Microsoft FoxPro class library 
VCX	Microsoft FoxPro class library 
VDA	Targa bitmap 
VI	Virtual Instrument file from National Instruments LABView product 
VIFF	Khoros Visualisation format 
VIR	File identified as a virus-infected file by Norton AntiVirus and 
	possibly others 
VIV	VivoActive Player streaming video file 
VIZ	Division's dVS/dVISE file 
VLB	Corel Ventura Library 
VMF	FaxWorks audio file 
VOC	Creative Labs Sound Blaster audio file 
VOX	Dialogic audio file coded using ADPCM 
VOX	Natural MicroSystems (NMS) formatted voice file 
VOX	Talking Technology audio file 
VP	Ventura Publisher publication 
VQE	Yamaha Sound-VQ Locator file 
VQF	Yamaha Sound-VQ file (possible emerging standard) 
VQL	Yamah Sound-VQ Locator file 
VRF	Oracle 7 configuration 
VRML	A VRML file 
VSD	Visio drawing (flow chart or schematic) 
VSL	Download List file (GetRight) 
VSS	Visio Stencil file 
VST	Targa bitmap 
VSW	Visio Workspace file 
VXD	Microsoft Windows virtual device driver 

WAB	Microsoft Outlook file 
WAD	Large file for Doom game containing video, player level, and other 
	information 
WAV	Windows Waveform sound 
WB1	QuattroPro for Windows spreadsheet 
WB2	QuattroPro for Windows spreadsheet 
WBK	Microsoft Word Backup 
WBL	Argo WebLoad II upload file 
WBR	Crick Software WordBar File 
WBT	Crick Software Wordbar Template 
WCM	WordPerfect Macro 
WDB	Microsoft Works database 
WEB	CorelXara Web document 
WFB	Turtle Beach WaveFront Bank (Maui/Rio/Monterey) 
WFD	Turtle Beach WaveFront Drum set (Maui/Rio/Monterey) 
WFN	symbols for use in Corel Draw 
WFP	Turtle Beach WaveFront Program (Maui/Rio/Monterey) 
WGP	Wild Board Games data file 
WID	Ventura width table 
WIL	WinImage file 
WIZ	Microsoft Word Wizard 
WK1	Lotus 123 versions 1 & 2 spreadsheet 
WK3	Lotus 123 version 3 spreadsheet 
WK4	Lotus 123 version 4 spreadsheet 
WKS	Lotus 123 Worksheet spreadsheet 
WKS	Microsoft Works document 
WLD	REND386/AVRIL file 
WLF	Argo WebLoad I upload file 
WLL	Microsoft Word Add-In 
WMF	Windows Metafile 
WOW	Grave Composer music module (MOD) file 
WP	WordPerfect document 
WPW	Novel PerfectWorks document 
WP4	WordPerfect 4 document 
WP5	WordPerfect 5 document 
WP6	WordPerfect 6 document 
WPD	WordPerfect Demo 
WPD	WordPerfect Document 
WPG	WordPerfect Graphic 
WPS	Microsoft Works document 
WPT	WordPerfect Template 
WQ1	QuattroPro/DOS spreadsheet 
WQ2	QuattroPro/DOS version 5 spreadsheet 
WR1	Lotus Symphony 
WRI	Write document 
WRK	Cakewalk music audio project file 
WRL	Virtual Reality model 
WRZ	Another VRML fileject 
WS1	WordStar for Windows 1 document 
WS2	WordStar for Windows 2 document 
WS3	WordStar for Windows 3 document 
WS4	WordStar for Windows 4 document 
WS5	WordStar for Windows 5 document 
WS6	WordStar for Windows 6 document 
WS7	WordStar for Windows 7 document 
WSD	WordStar 2000 document 
WVL	Wavelet Compressed Bitmap 
WWL	Microsoft Word add-in file 

X	AVS image format 
XAR	Corel Xara drawing 
XBM	A MIME 'xbitmap' image 
XI	Instrument sample file for ScreamTracker 
XIF	Wang imaging file (comes with Windows 95) 
XLA	Microsoft Excel add-in 
XLB	Microsoft Excel toolbar 
XLC	Microsoft Excel chart 
XLD	Microsoft Excel dialogue 
XLK	Microsoft Excel backup 
XLL	Microsoft Excel add-in file 
XLM	Microsoft Excel macro 
XLS	Microsoft Excel worksheet 
XLT	Microsoft Excel template 
XLV	Microsoft Excel VBA module 
XLW	Microsoft Excel workbook / workspace 
XM	FastTracker 2, Digital Tracker music module (MOD) file 
XNK	Microsoft Exchange shortcut file 
XPM	X BitMap format 
XR1	Epic MegaGames Xargon data file 
XTP	XTree data file 
XWD	X Window Dump format 
XWF	Yamaha XG Works file (MIDI sequencing) 
XY3	XYWrite III document 
XY4	XYWrite IV document 
XYP	XYWrite III Plus document 
XYW	XYWrite for Windows 4.0 document 
X16	Macromedia Extra (program extension), 16 bit 
X32	Macromedia Extra (program extension), 32 bit 

YAL	Arts & Letters clipart library 
YBK	Microsoft Encarta Yearbook 

Z	Unix Gzip Compressed 
ZIP	Zip file Compressed archive 
ZOO	An early compressed file format 

000-999 Used to number old (backup) versions of files (for example, 
	CONFIG.SYS when changed by an installation program); also used to 
	number related data files for multiple users of a small- scale PC 
	application 
12M	Lotus 123 97 Smartmaster file 
123	Lotus 123 97 file 
2GR	and 3GR VGA Graphics driver/configuration files under Windows 
3DM	3D NURBS modeler, Rhino 
3DS	A file in 3D Studio (for DOS) format 
386	A file for use in an 80386 or higher microprocessor 
4GE	Informix 4GL compiled code 
4GL	Informix 4GL source code 
669	Composer 669, Unis Composer music mod file 
669	669 tracker module 
#01	and higher A method of numbering picture files for a roll of film 
	that has been scanned for computer presentation 
$$$	Used by OS/2 to keep track of archived files 
@@@	Screen files used in the installation and instruction on use of 
	such applications as Microsoft Codeview for C