Nowadays we are using and seeing many types of file formats . But we don’t know the meaning of many file formats.Here I listed some of the file formats which I know.

• .$$$ -Temporary file
• .$$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

• A -ADA program file or UNIX library
• .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

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 used.

I think these file formats will help you to access any files.