Pc File Extention Listing...

This chart is a list of the most commonly found extensions, what type of file they are and what program if any they are associated with.

.$$$ Temporary file
.$$A OS/2 program file
.$$F OS/2 database file
.$$S OS/2 spreadsheet file
.$D$ OS/2 planner file
.$DB DBASE IV temporary file
.$ED Microsoft C temporary editor file.
.$VM Microsoft Windows temporary file for virtual managers.
._DD Norton disk doctor recovery file.
._DM Nuts n Bolts disk minder recovery file.
.--- File used to backup sys, ini, dat, and other important files from Windows 3.1 and above.
.075 Ventura Publisher 75x75 dpi screen characters
.085 Ventura Publisher 85x85 dpi screen characters
.091 Ventura Publisher 91x91 dpi screen characters
.096 Ventura Publisher 96x96 dpi screen characters
.0B Pagemaker printer font LineDraw enhanced characters.
.1ST File used by some software manufacturers to represent a file that should be read first before starting the program.
.2GR File used in Windows 3.x to display the graphics on older 286 and 386 computers.
.386 Virtual machine support files for the 386 enhanced mode.
.3GR File used in Windows 3.x to display the graphics on later 386, 486 and Pentium computers.
.4SW 4DOS Swap file

A

.A3W MacroMedia Authorware 3.5 file
.ABK Autobackup file used with Corel Draw 6 and above.
.ABR Brush file for Adobe Photoshop
.ACT Adobe Photoshop Color table file.
.AD After Dark file.
.ADF Adapter description files.
.ADM After Dark screen saver module.
.ADR After Dark randomizer
.AI Adobe Illustrator file.
.AIF Auto Interchange File Format (AIFF) Audio file.
.ANI Windows 95 / Windows 98 / Windows NT animated mouse cursor file.
.ANS ANSI text file.
.ARJ Compressed file can be used with Winzip / Pkzip.
.ASC ASCII Text file
.ASF Sort for Advanced Streaming Format, file developed by Microsoft. The .ASF file is generally a movie player and can be open with software such as Windows Media Player.
.ASP Microsoft FrontPage Active Server Pages. To open these files use your internet browser.
.AVI Windows Movie file.

B

.BAK Backup file used for important windows files usually used with the System.ini and the Win.ini.
.BAS QBasic program and or Visual Basic Module.
.BAT Batch file that can perform tasks for you in dos, like a macro.
.BFC Microsoft Windows 95 / Windows 98 Briefcase file.
.BG Backgammon game file.
.BIN Translation tables for code pages other than the standard 437.
.BK2 Word Perfect for Windows Backup file
.BK3 Word Perfect for Windows Backup file
.BK4 Word Perfect for Windows Backup file
.BK5 Word Perfect for Windows Backup file
.BK6 Word Perfect for Windows Backup file
.BK7 Word Perfect for Windows Backup file
.BK8 Word Perfect for Windows Backup file
.BK9 Word Perfect for Windows Backup file
.BMP Graphical Bit Mapped File used in Windows Paintbrush.
.BNK Sim City Backup
.BPS Microsoft Works Word Processor File.
.BPT Corel Draw Bitmap master file
.BV1 Word Perfect for Windows Backup file
.BV2 Word Perfect for Windows Backup file
.BV3 Word Perfect for Windows Backup file
.BV4 Word Perfect for Windows Backup file
.BV5 Word Perfect for Windows Backup file
.BV6 Word Perfect for Windows Backup file
.BV7 Word Perfect for Windows Backup file
.BV8 Word Perfect for Windows Backup file
.BV9 Word Perfect for Windows Backup file
.BWP BatteryWatch pro file.

C

.C C file used with the C programming language.
.CAB Cabinet file used in Windows 95 and Windows 98 that contains all the windows files and drivers. Information about how to extract a .CAB file can be found on document CH000363.
.CAL Windows Calendar, Supercalculator4 file or Supercal spreadsheet.
.CBL COBOL Program File
.CBT Computer Based Training files.
.CDA CD Audio Player Track.
.CDR Corel Draw Vector file.
.CFB Comptons Multimedia file
.CFG Configuration file
.CFL Corel flowchart file
.CFM Corel FontMaster file / Cold Fusion Template file / Visual dBASE windows customer form
.CHK Scandisk file which is used to back up information that scandisk has found to be bad, found in C root. Because the information within these files are corrupted or reported as bad by Scandisk it is perfectly fine to delete these files, providing you are currently not missing any information. Additional information about scandisk can be found on our scandisk page.
.CL Generic LISP source code.
.CL3 Easy CD Creator layout file.
.CL4 Easy CD Creator layout file.
.CLA Java Class file.
.CLG Disk catalog database
.CLK Corel R.A.V.E. animation file.
.CLL Crick software clicker file
.CLO Cloe image
.CLP Windows Clipboard / Quattro Pro clip art / Clipper 5 compiler script
.CLR WinEdit Colorization word list / 1st reader binary color screen image / PhotStyler color definition
.CLS Visual Basic Class module / C++ Class definition
.CMD Windows Script File also OS/2 command file.
.CMV Corel Movie file.
.CNT Help file (.hlp) Contents (and other file contents)
.CPL Windows 95 / Windows 98 / Windows NT control panel icons.
.CNE Configuration file that builds .COM files.
.CNF Configuration file.
.COB COBOL source code file.
.COD FORTRAN Compiler program code
.COM File that can be executed.
.CPE Fax cover page file
.CPI Code Page Information or Microsoft Windows applet control panel file
.CPP C++ source code file.
.CRD Windows Card file.
.CSV Comma-Separated Variable file. Used primary with databases and spreadsheets / Image file used with CopuShow
.CUR Windows Mouse Cursor.
.CVS Canvas drawing file
.CXX C++ program file or Zortech C++ file.


D



.DAT Data file, generally associated or extra data
for a program to use.

.DB Paradox database file / Progress database file

.DB2 dBase II file

.DBC Microsoft Visiual Foxpro database container

.DBF dBase II,III,III+,IV / LotusWorks database.

.DBK dBase databse backup / Orcad schematic
capture backup file

.DBM Cold Fusion template

.DBO dBase IV compiled program file

.DBQ Paradox memo

.DBT dBase database text file

.DBV Flexfile memo field file

.DBW DataBoss database file

.DBX Database file / DataBeam Image / MS Visual
Foxpro Table

.DEV Device Driver

.DIF Document Interchange Format; VisiCalc

.DLL Dynamic Link Library; Allow executable code
modules to be loaded on demand, linked at run time, and unloaded when not
needed. Windows uses these files to support foreign languages and
international/nonstandard keyboards.

.DMO Demo file

.DMP Dump file

.DMD Visual dBASE data module

.DMF Delusion/XTracker Digital Music File

.DMO Demo file

.DMP Dump file

.DMS Compressed archive file

.DOC Microsoft Word Windows/DOS / LotusWorks word
processor Windows/DOS /PF S:First Choice Windows/DOS DOT MS Word Windows/DOS.

.DOS Text file and DOS Specification Info

.DOT Microsoft Word Template (Macro).

.DRV Device driver files that attach the hardware
to Windows. The different drivers are system, keyboard, pointing devices,
sound, printer/ plotter, network, communications adapter.

.DRW Micrografx draw/graph files.

.DT_ Macintosh Data File Fork

.DTA Data file

.DTD SGML Document definition file

.DTF Q&A database

.DTM DigiRekker module

.DTP SecurDesk! Desktop / Timeworks Publisher Text
Document / Pressworks Template file

.DUN Dialup Networking exported file.

.DX Document Imaging file / Digital data exchange
file

.DXB Drawing interchange binary file

.DXF Autocad drawing interchange format file

.DXN Fujitsu dexNet fax document

.DXR Macromedia director projected movie file

.DYN Lotus 1-2-3 file

.DWG AutoCad Drawing Database



E



.EEB Button bar for Equation Editor in Word
Perfect for Windows

.EFT CHIWRITER high resolution screen characters

.EGA EGA screen characters for Ventura Publisher

.ELG Event List text file used with Prosa

.EMS Enhanced Menu System configuration file for
PC Tools

.EMU IRMA Workstation for Windows emulation

.ENC ADW Knowledge Ware Encyclopedia

.END Corel Draw Arrow Definition file

.ENG Sprint dictionary file engine

.ENV Word Perfect for Windows environment file.

.EPG Exported PaGe file used with DynaVox

.EPS Encapsulated Postscript, with embedded TIFF
preview images.

.EQN Word Perfect for Windows Equation file

.ERD Entity Relation Diagram graphic file

.ERM Entity Relation Diagram model file

.ERR Error log file

.ESH Extended Shell Batch file

.EVT Event file scheduler file for PC Tools

.EX3 Device driver for Harvard graphics 3.0

.EXC QEMM exclude file from optimization file or
Rexx program file

.EXE Executable file.

.EXT Extension file for Norton Commander



F



.FDF Adobe Acrobat Forms Document.

.FF AGFA CompuGraphics outline font description.

.FFA Microsoft Fast Find file.

.FFF GUS PnP bank / defFax fax document

.FFL Microsoft Fast Find file / PrintMaster Gold
form file

.FFO Microsoft Fast Find file

.FFT DCA/FFT final form text

.FFX Microsoft Fast Find file

.FON Font files to support display and output
devices.

.FR3 dBase IV renamed dBase III+ form

.FRF FontMonger Font

.FRG dBase IV uncompiled report

.FRK Compressed zip file used with Apple Macinotsh
computers.

.FRM Form file used with various programs /
Microsoft Visual Basic Form / FrameMaker document / FrameBuilder file / Oracle
executable form / Word Perfect Merge form / DataCAD symbol report file

.FRO dBase IV compiled report / FormFlow file

.FRP PerForm Pro Plus Form

.FRS WordPerfect graphics driver

.FRT FoxPro report file

.FRX Microsoft Visual basic binary form file /
FoxPro report file

.FRZ FormFlow file



G



.GIF CompuServe Graphics Interchange Format.

.GR2 286 grabbers that specify which font to use
with DOS and Windows.

.GR3 386 grabbers that specify which font to use
with DOS and Windows.

.GRA Microsoft Flight simulator graphics file

.GRB Microsoft MS-DOS shell monitor

.GRF Micrografx draw/graph files.

.GRP Microsoft Program Group.

.GZ Compressed Archive file for GZip



H

.HBK Mathcad handbook file

.HDL Procomm Plus alternate download file listing

.HDR Procomm Plus message header

.HDX Help index

.HEX Hex dump

.HFI GEM HP font info

.HGL HP graphics language graphic

.HH C++ Header

.HHH Precompiled Header for Power C

.HHP Help data for Procomm Plus

.HLP Files that contain the Help feature used in
windows, cannot be read from DOS.

.HQX Apple Macintosh Binhex text conversion file.

.HSQ Data files associated with the Qaz Trojan.

.HSS Photoshop Hue/Saturation information.

.HST History file / Procomm Plus History File /
Host file.

.HTA Hypertext Application (run applications from
HTML document).

.HTM Web page files containing HTML or other
information found on the Internet.
I

.ICA Citrix file / IOCA graphics file
.ICB Targa Bitmap
.ICC Kodak printer image
.ICE Archive file
.ICL Icon library file
.ICM Image Color Matching profile file
.ICN Microsoft Windows Icon Manager.
.ICO Microsoft Windows Icondraw / Icon.
.ID Disk identification file.
.IDB Microsoft developer intermediate file, used with Microsoft Visual Studio
.IDD MIDI instruments definition
.IDE Integrated Development Environment configuration file
.IDF MIDI instruments drivers file
.IDQ Internet data query file
.IDX Index file
.IFF IFF/LBM (Amiga) used by Computer Eyes frame grabber.
.IMG GEM/IMG (Digital Research) or Ventura Publisher bitmap graphic
.INF Information file that contains customization options.
.INI Files that initialize Windows and Windows apps.
.IPF Installer Script File / OS/2 online documentation for Microsoft source files.
.ISO Compressed file used for an exact duplicate of a CD. .ISO files can be extracted or opened such programs as Win Image that can be found on our shareware download section.
.IWA IBM Writing Assistant Text file.

J

.JAS Graphic
.JPG Graphic commonly used on the Internet and capable of being opened by most modern image editors.
.JS JavaScript file.
.JSB Henter-Joyce Jaws script binary file
.JSD eFAX jet suite document
.JSE JScript encoded script file
.JSH Henter-Joyce Jaws script header file
.JSL PaintShop pro file
.JSM Henter-Joyce Jaws script message file
.JSP Java server page
.JSS Henter-Joyce Jaws script source file
.JT JT fax file
.JTF JPEG tagged Interchange format file
.JTK Sun Java toolkit file
.JTP JetForm file
.JW Justwrite text file
.JWL Justwrite text file library
.JZZ Jazz spreadsheet

K

.KAR Karaoke File used with some audio players.

L

.LGC Program Use Log File (for Windows Program Use Optimization).
.LGO Contains the code for displaying the screen logo.
.LOG Contains the process of certain steps, such as when running scandisk it will usually keep a scandisk.log of what occurred.
.LNK HTML link file used with Microsoft Internet Explorer.
.LWP Lotus Wordpro 96/97 file.

M

.MAC Macintosh macpaint files.
.MBX Microsoft Outlook Express mailbox file.
.MD Compressed Archive file
.MDA Microsoft Access Add-in / Microsoft Access 2 Workgroup.
.MDB Microsoft Access Database / Microsoft Access Application.
.MDE Microsoft Access Database File
.MDF Menu definition file
.MDL Digitrakker Music Module / Rational Rose / Quake model file
.MDM Telix Modem Definition
.MDN Microsoft Access Blank Database Template
.MDP Microsoft Developer Studio Project
.MDT Microsoft Access Add-in Data
.MDW Microsoft Access Workgroup Information
.MDX dBase IV Multiple Index
.MDZ Microsoft Access Wizard Template
.MEB WordPerfect Macro Editor bottom overflow file
.MED WordPerfect Macro Editor delete save / OctaMed tracker module
.MEM WordPerfect Macro Editor macro / Memory File of variables
.MID Midi orchestra files that are used to play with midi sounds built within the sound card.
.MIX Power C object file / Multiplayer Picture file (Microsoft Photodraw 2000 & Microsoft Picture It!) / Command & Conquer Movie/Sound file
.MOD Winoldap files that support (with grabbers) data exchange between DOS apps and Windows apps.
.MOV File used with Quick Time to display a move.
.MP1 MPEG audio stream, layer I
.MP2 MPEG audio stream, layer II
.MP3 MPEG audio stream, layer III; High compressed audio files generally used to record audio tracks and store them in a decent sized file available for playback. See our MP3 page for additional information.
.MPG MPEG movie file.
.MSN Microsoft Network document / Decent mission file
.MTF Windows metafile.
.MTH Derive Math file
.MTM Sound file / MultiTracker music module
.MTV Picture file
.MTW Minitab data file
.MU Quattro menu
.MUL Ultima Online game
.MUP Music publisher file
.MUS Audio file
.MVB Database file / Microsoft multimedia viewer file
.MVE Interplay video file
.MVF Movie stop frame file
.MWP Lotus Wordpro 97 smartmaster file
.MXD ArcInfo map file
.MXT Microsoft C Datafile
.MYD Make your point presentation file.


N



.N64 Nintendo 64
Emulator ROM image.

.NA2 Netscape
Communicator address book.

.NAB Novell Groupwise
address book

.NAP Napster Music
security definition file.

.NDF NeoPlanet Browser
file

.NDX Indexed file for
most databases.

.NES Nintendo
Entertainment system ROM image.

.NIL Norton guide online
documentation

.NGF Enterasys Networks
NetSight file.

.NHF Nero HFS-CD
compilation or a general Nero file

.NIL Norton icon lybrary
file.

.NLB Oracle 7 data file

.NLD ATI Radeon video
driver file,

.NMI SwordSearcher file.

.NON LucasArts Star Wars
- Tie fighter mouse options file.

.NOW Extension commonly
used for readme text files.

.NRA Nero Audio CD file.

.NRB Nero CD-ROM boot
file.

.NS2 Lotus Notes 2
database,

.NS5 Lotus Notes Domino
file,

.NSO NetStudio easy web
graphics file.

.NT Windows NT startup
file.

.NUM File used with some
Software Manufactures to store technical support numbers or other phone
numbers, should be readable from DOS and or Windows.



O



.OCA Control Typelib
Cache.

.OCX Object Linking and
Embedding (OLE) control extension.

.OLB Object library

.OLD Used for backups of
important files incase they are improperly updated or deleted.

.OLE Object Linking and
Embedding object file

.OLI Olivetti text file

.ORI Original file.



P



.PAB Personal Address
Book, file used with Microsoft Outlook.

.PB WinFax Pro phone
book file

.PBD PowerBuilder
dynamic library / Faxit phone book file

.PBF Turtle Beach
Pinnacle bank file

.PBK Microsoft phonebook
file

.PBL PowerBuilder
library file

.PBM UNIX portable
bitmap fuke

.PBR PowerBuilder
resource

.PBI Profiler binary
input file

.PBM PBM portable bit
map graphic

.PBO Profiler binary
output

.PBT Profiler binary
table

.PCX Microsoft Paint
& PC Paintbrush Windows/DOS.

.PDA Bitmap graphic file

.PDB TACT data file

.PDD Adobe PhotoDeluxe
Image.

.PDF Adobe Acrobat
Reader file which can only be read by Adobe Acrobat (to get file downloaded
Adobe Acrobat from our Download Page.

.PDL Borland C++ project
description language file.

.PDS Graphic file /
Pldasm source code file.

.PDV Paintbrush printer
driver.

.PDW Professional Draw
document.

.PIC Picture / Viewer
Frame Class.

.PIF Program Information
File that configures a DOS app to run efficiently in windows.

.PJF Paintjet soft font
file.

.PL Harvard palette file
/ PERL program file

.PL3 Harvard chart
palette

.PLB Foxpro library /
LogoShow Screensaver file

.PLC Lotus Add-in

.PLD PLD2 source file

.PLG REND386 / AVRIL
file

.PLI Oracle 7 data
description

.PLL Prelinked library

.PLM DisorderTracker2
module

.PLN WordPerfect
spreadsheet file

.PLR Descent Pilot file

.PLS WinAmp MPEG
playlist file / DisorderTracker 2 Sample file / Shoutcast file / MYOB data file

.PLT AutoCAD HPGL vector
graphic plotter file / Gerber sign-making software file / Betley's CAD
Microstation driver configuration for plotting

.PLY Autodesk polygon

.PP Compressed archive
file.

.PP4 Picture Publisher.

.PP5 Picture Publisher.

.PPA Power Point Add-in.

.PPB WordPerfect Print
preview button bar.

.PPD PostScript Printer
description.

.PPF Turtle Beach
Pinnacle program file.

.PPI Microsoft
PowerPoint graphic file.

.PPL Harvard (now Serif)
Polaroid Palette Plus ColorKey Driver.

.PPM PBM Portable
Pixelmap Graphic.

.PPO Clipper
Preprocessor Output.

.PPP Serif PagePlus
Publication.

.PPS Microsoft
PowerPoint Slideshow.

.PPT Microsoft
PowerPoint presentation.

.PPX Serif PagePlus
publication.

.PPZ Microsoft
PowerPoint Packaged Presentation.

.PS2 File to support the
Micro Channel Architecture in 386 Enhanced mode.

.PSD Adobe Photoshop
image file.

.PST Post Office Box
file used with Microsoft Outlook usually mailbox.pst unless named otherwise.

.PWA Password agent
file.

.PWD Password file.

.PWF ProCite Workforms

.PWL Password file used
in Windows 95 and Windows 98 is stored in the Windows directory.

.PWP Photoworks image
file

.PWZ PowerPoint wizard



Q



.QIC Windows backup file

.QT Quick Time Movie
File

.QXD Quark Express file

.QXL Quark Xpress
element library

.QXT Quark Xpress
template file



R



.RA Real Audio file.

.RAM Real Audio file.

.RAR Compressed file
similar to .ZIP uses different compression program to extract. See our
recommended download page for a program that can be used to extract .RAR files.

.RAS File extension used
for raster graphic files.

.RD1 Descent registered
level file


.RD3 Ray Dream designer
graphics file / CorelDraw 3D file

.RD4 Ray Dream designer
graphics file

.RD5 Ray Dream designer
graphics file

.RDB TrueVector rules
database

.RDF Resource
description framework file / Chromeleon report definition

.RDL Descent registered
level file / RadioDestiny radio stream

.RDX Reflex data file

.REC Sound file used
with Windows Sound Recorder.

.RLE Microsoft Windows
Run Length Encoded (Run Length Encoded (bitmap format) file that contains the
actual screen logo).

.RMI Microsoft RMID
sound file.

.RPB Automotive
diagnostic file.

.RPD Rapidfile database

.RPM Red Hat Package
Manager / RealMedia Player file.

.RPT Various Report file

.RTF Rich Text Format
file

.RWZ Microsoft Outlook
rules wizard file.


N



.N64 Nintendo 64
Emulator ROM image.

.NA2 Netscape
Communicator address book.

.NAB Novell Groupwise
address book

.NAP Napster Music
security definition file.

.NDF NeoPlanet Browser
file

.NDX Indexed file for
most databases.

.NES Nintendo
Entertainment system ROM image.

.NIL Norton guide online
documentation

.NGF Enterasys Networks
NetSight file.

.NHF Nero HFS-CD
compilation or a general Nero file

.NIL Norton icon lybrary
file.

.NLB Oracle 7 data file

.NLD ATI Radeon video
driver file,




.NMI SwordSearcher file.

.NON LucasArts Star Wars
- Tie fighter mouse options file.

.NOW Extension commonly
used for readme text files.

.NRA Nero Audio CD file.

.NRB Nero CD-ROM boot
file.

.NS2 Lotus Notes 2
database,

.NS5 Lotus Notes Domino
file,

.NSO NetStudio easy web
graphics file.

.NT Windows NT startup
file.

.NUM File used with some
Software Manufactures to store technical support numbers or other phone
numbers, should be readable from DOS and or Windows.



O



.OCA Control Typelib
Cache.

.OCX Object Linking and
Embedding (OLE) control extension.

.OLB Object library

.OLD Used for backups of
important files incase they are improperly updated or deleted.

.OLE Object Linking and
Embedding object file

.OLI Olivetti text file

.ORI Original file.



P



.PAB Personal Address
Book, file used with Microsoft Outlook.

.PB WinFax Pro phone
book file

.PBD PowerBuilder
dynamic library / Faxit phone book file

.PBF Turtle Beach
Pinnacle bank file

.PBK Microsoft phonebook
file

.PBL PowerBuilder
library file

.PBM UNIX portable
bitmap fuke

.PBR PowerBuilder
resource

.PBI Profiler binary
input file

.PBM PBM portable bit
map graphic

.PBO Profiler binary
output

.PBT Profiler binary
table

.PCX Microsoft Paint
& PC Paintbrush Windows/DOS.

.PDA Bitmap graphic file

.PDB TACT data file

.PDD Adobe PhotoDeluxe
Image.

.PDF Adobe Acrobat
Reader file which can only be read by Adobe Acrobat (to get file downloaded
Adobe Acrobat from our Download Page.

.PDL Borland C++ project
description language file.

.PDS Graphic file /
Pldasm source code file.

.PDV Paintbrush printer
driver.

.PDW Professional Draw
document.

.PIC Picture / Viewer
Frame Class.

.PIF Program Information
File that configures a DOS app to run efficiently in windows.

.PJF Paintjet soft font
file.

.PL Harvard palette file
/ PERL program file

.PL3 Harvard chart
palette

.PLB Foxpro library /
LogoShow Screensaver file

.PLC Lotus Add-in

.PLD PLD2 source file

.PLG REND386 / AVRIL
file

.PLI Oracle 7 data
description

.PLL Prelinked library

.PLM DisorderTracker2
module

.PLN WordPerfect
spreadsheet file

.PLR Descent Pilot file

.PLS WinAmp MPEG
playlist file / DisorderTracker 2 Sample file / Shoutcast file / MYOB data file

.PLT AutoCAD HPGL vector
graphic plotter file / Gerber sign-making software file / Betley's CAD
Microstation driver configuration for plotting

.PLY Autodesk polygon

.PP Compressed archive
file.

.PP4 Picture Publisher.

.PP5 Picture Publisher.

.PPA Power Point Add-in.

.PPB WordPerfect Print
preview button bar.

.PPD PostScript Printer
description.

.PPF Turtle Beach
Pinnacle program file.

.PPI Microsoft
PowerPoint graphic file.

.PPL Harvard (now Serif)
Polaroid Palette Plus ColorKey Driver.

.PPM PBM Portable
Pixelmap Graphic.

.PPO Clipper
Preprocessor Output.

.PPP Serif PagePlus
Publication.

.PPS Microsoft
PowerPoint Slideshow.

.PPT Microsoft
PowerPoint presentation.

.PPX Serif PagePlus
publication.

.PPZ Microsoft
PowerPoint Packaged Presentation.

.PS2 File to support the
Micro Channel Architecture in 386 Enhanced mode.

.PSD Adobe Photoshop
image file.

.PST Post Office Box
file used with Microsoft Outlook usually mailbox.pst unless named otherwise.

.PWA Password agent
file.

.PWD Password file.

.PWF ProCite Workforms

.PWL Password file used
in Windows 95 and Windows 98 is stored in the Windows directory.

.PWP Photoworks image
file

.PWZ PowerPoint wizard



Q



.QIC Windows backup file

.QT Quick Time Movie
File

.QXD Quark Express file

.QXL Quark Xpress
element library

.QXT Quark Xpress
template file



R



.RA Real Audio file.

.RAM Real Audio file.

S



.SAV File that usually
contains saved information such as a saved game.

.SC2 Maps used in Sim
City 2000.

.SCP Dialup Networking
script file.

.SCR Source files for
the .INI files, or sometimes may be used as screen savers.

.SD Sound Designer I
audio file

.SD2 Sound Designer II
flattened file / Sound Designer II data fork file / SAS database file

.SDA StarOffice drawing
file / SoftCuisine data archive

.SDC StarOffice
spreadsheet

.SDD StarOffice
presentation

.SDF Standard data
format file / Schedule data file / System file format / Autodesk mapguide
spatial data file

.SDK Roland S-series
floppy disk image

.SDL SmartDraw library

.SDN Small archive

.SDR SmartDraw drawing

.SDS StarOffice chart
file / Raw MIDI sample dump standard file

.SDT SmartDraw template

.SDV Semicolon divided
value file

.SDW Sun Microsystems
StarOffice file document file similar to the Microsoft Office .DOC file.

.SDX MIDI sample dump
standard files compacted by SDX

.SEA Short for Self
Extracting Archive. Compressed file used with the Macintosh.

.SH Archive file

.SH3 Harvard (now Serif)
presentation file

.SHB Corel Background
file

.SHG Hotspot Editor
Hypergraphic

.SHK Macintosh Compressed
Archive file

.SHM WordPerfect Shell
Macro

.SHP 3D Studio Shapes
File / other 3D related file

.SHR Archive file

.SHS Shell scrap object
file

.SHW Corel presentation
/ WordPerfect Slide Show / Show File

.SLK Multiplan file.

.SND Sound Clip file /
Raw unsigned PCM data / AKAI MPC-series sample / NeXT sound / Macintosh sound
resource file

.SNG MIDI song

.SNM Netscape Mail

.SNO SNOBOL program file

.SNP Snapview snapshot
file

.SUM Summary file.

.SWF Macromedia Flash
file.

.SWP Extension used for
the Windows Swap File usually Win386.Swp. This file is required by Windows and
generally can grow very large in size sometimes up to several hundred megs.
This file is used to swap information between currently running programs and or
memory. If this file is deleted from the computer Windows will be unable to
load and will need to be reinstalled.

.SYS System and
peripheral drivers.



T



.TDF Trace Definition
File used with OS/2

.TGA Targa file

.TIF Tag Image Format
that includes most 24-bit color.

.TLB Remote automation
truelib files / OLE type library / Visual C++ type library

.TLD Tellix file

.TLE NASA two-line
element set

.TLP Microsoft project
timeline fie

.TLT Trellix web design
file

.TLX Trellix data file

.TMP Temporary files.

.TRM Windows Terminal.

.TXT Text file that can
be read from windows of from DOS by using the Edit, Type, or Edlin.



U



.UNI MikMod (UniMod)
format file / Forcast Pro data file

.UNK Unknown file type,
sometimes used when a file is received that cannot be identified

.UNX Text file generally
associated with UNIX.

.URL File used with some
browsers such as Internet Explorer linking you to different web pages. Internet
Shortcut.



V



.VB VBScript file

.VBA vBase file

.VBD ActiveX file

.VBE VBScript encoded
script file

.VBG Visual Basic group
project file

.VBK VisualCADD backup
file

.VBL User license
control file

.VBP Visual Basic
project file

.VBR Remote automation
registration files

.VBS Microsoft Visual
Basic Script file for quick programs and in some cases can be used as a virus
file.

.VBW Visual Basic
project workplace

.VBX Visual Basic
extension file

.VBZ Wizard launch file

.VC VisiCalc Spreadsheet
file.

.VCD VisualCADD Drawing
file.

.VCE Natural
MicroSystems voice file.

.VCF vCard File / Vevi
Configuration file.

.VCS Microsoft Outlook
vCalander file.

.VCT FoxPro class
library.

.VCW Microsoft Visual
C++ workbench information file.

.VCX FoxPro class
library.

.VDA Targa bitmap

.VDD Short for Virtual
Device Driver. Additional information can be found here.

.VDO VDOScript file

.VDX No such file
extension - Likely you meant to .vxd

.VM Virtual Machine /
Virtual Memory file.

.VMM Virtual Machine
(Memory Manager) file.

.VMF Ventura font
characteristics file / FaxWorks audio file

.VMH

.VS2 Roland-Bass
transfer file.

.VSD Visio drawing.

.VSL GetRight download
list file.

.VSS Visio stencil.

.VST Video Template /
Truevision Vista graphic / Targa Bitmap/

.VSW Visio workspace
file.

.VXD Windows system
driver file allowing a driver direct access to the Windows Kernel, allowing for
low level access to hardware.



W



.WAB Microsoft Outlook
Express personal address book.

.WAD File first found in
IdSoftware games such as DOOM, Quake, as well as most new games similar to
these.

.WAV Sound files in
Windows open and played with sound recorder.

.WB1 Quattro Pro
Notebook

.WB2 Quattro Pro
Spreadsheet

.WBF Microsoft Windows
Batch File

.WBK Wordperfect
document / workbook

.WBT Winbatch batch file

.WCD Wordperfect macro
token list

.WCM Microsoft Works
data transmission file / Wordperfect Macro

.WCP Wordperfect product
information description

.WDB Microsoft Works
database

.WEB Web source code
file

.WFM dBASE Form object

.WFN CorelDRAW font

.WFX Winfax data file

.WG1 Lotus 1-2-3
worksheet

.WG2 Lotus 1-2-3 for
OS/2 worksheet

.WID Ventura publisher
width table

.WIN Foxpro - dBASE
window file

.WIZ Microsoft Publisher
page wizard

.WK1 Lotus 1-2-3 all
versions / LotusWorks spreadsheet.

.WK3 Lotus 1-2-3 for
Windows /Lotus 1-2-3 Rel.3.

.WKS Lotus 1-2-3 Rel
lA,2.0,2.01, also file used with Microsoft Works.

.WLG Dr. Watson log
file.

.WMA Windows Media Audio
file.

.WMF Windows Metafile.
Also see WMF dictionary definition.

.WMZ Windows Media
Player theme package file.

.WPD WordPerfect
Windows/DOS.

.WPG WordPerfect
Graphical files Windows/DOS.

.WPM WordPerfect Macro
file.

.WPS MS Works word
processor Windows/DOS.

.WRI Windows Write.

.WRK Lotus 1-2
31.0,1.01,1.1/ Symphony 1,1.01.

.WRI Symphony l.1,1.2,2
/ Microsoft Write file.



X



.XIF Wang image file /
Xerox image file

.XLB Microsoft Excel
File.

.XLS Microsoft Excel
File.

.XM Sound file / Fast
tracker 2 extended module

.XML Extensible markup
language file.

.XNK Exchange shortcut

.XOT Xnetech job output
file

.XPM X picsmap graphic

.XQT SuperCalc macro
sheet

.XRF Cross Reference

.XR1 Epic MegaGames
Xargon File

.XSL XML Style sheet

.XSM LEXIS-NEXIS tracker

.XTB LocoScript external
translation table

.XWD X Windows dump file

.XWF Yamaha XG Works
file

.XXE Xxencoded file

.XY XYWrite text file

.XY3 XYWrite text file

.XY4 XYwrite IV document

.XYP XYwrite III plus
document

.XYW XYwrite Windows 4.0
document



Y



.Y Amiga YABBA
compressed file archive

.Y01 Paradox index file

.Y02 Paradox index file

.Y03 Paradox index file

.Y04 Paradox index file

.Y05 Paradox index file

.Y06 Paradox index file

.Y07 Paradox index file

.Y08 Paradox index file

.Y09 Paradox index file

.YUV Yuv graphics file

.YZ YAC compressed file
archive.



Z



.Z Compressed file that
can hold thousands of files. To extract all the files Pkzip or Winzip will need
to be used. UNIX / Linux users use the compress / uncompress command to extract
these files.

.ZIP Compressed file
that can hold thousands of files. To extract all the files Pkzip or Winzip will
need to be use

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