PC File Extensions # - H


.$$$     Temporary file
.$$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.
             .4SW4DOS 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.
.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
.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
.EMUI   RMA 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.
.FFA     GFA 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.

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