EddyHawk's Info List
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File Extension
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 Source: SiSoft/Sandra/99.3.5.0/Help
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.!JG	Thumbnails for Photofinish change JPG to !JG, PCS to !PC, etc.
.2GR	286 Grabber File 
.386	Windows Virtual Device Driver
.3GR	386 Grabber File 
.ABM	Image PALS album file
.ABR	Adobe Brush file for PhotoShop
.ACF	Adobe Custom Filter for PhotoShop
.ACM	Audio Compression Module add-on to MSACM.DRV Windows driver
.ACO	Adobe Color Palette
.AD	After Dark Module (DLL)
.ADL	MicroChannel Adapter Description Library File
.ADM	After Dark support file
.ADR	After Dark support file
.AI	Adobe Illustrator EPS file
.AIF	Audio compressed files
.AIFC	.AIF files
.AIFF	.AIF files
.ALO	Almanac support file
.AMS	Adobe Monitor Set-up calibration file for PhotoShop
.API	Adobe Printer Ink file for PhotoShop
.APL	Support module used by Manugraphics APL products
.AQL	America On-line for Windows DLL
.ARC	Archive file for ARC, compressed files
.ARJ	Compressed file for ARJ compression utility
.ARK	Managing your Money Archive File
.ASM	Assembly Language source code
.AST	Adobe Colour Separation table for PhotoShop
.AU	NeXT/Sun digital audio format
.AVI	Audio Visual Interleaved multimedia format
.AWD	Microsoft Fax document
.AWX	Custom Application Wizard file
.B64	Base 64 encoded files
.BAK	Backup File, made by notepad or other programs
.BAS	BASIC source code
.BAT	batch file
.BFC	Windows Briefcase files
.BGI	Borland Graphics Interface; drivers for Pascal and some other Borland languages
.BI	BASIC include file (Visual Basic for DOS)
.BIN	Binary file, used by many programs with program dependent format
.BMP	BitMaP; Windows graphics format
.BMT	Ami Pro Button
.BNK	AdLib Instrument ID file
.BST	BiblioTex file (BiblioTex bibliography file for TeX)
.BTN	Makeover Button file
.C	C source code
.CAB	Windows Cabinet File
.CAL	Windows Calendar File
.CAP	ProComm Capture file
.CAT	CP's Backup Catalogue
.CBS	Master Word button bar configuration file
.CDA	CD-Audio File
.CDR	Corel Draw file
.CFG	Configuration file -- used by many programs for configuration data with program dependent format
.CGM	Computer Graphics Metafile; object graphics format
.CH3	Harvard  Graphics file format
.CHP	Ventura Publisher Chapter Files
.CHR	Borland language stroke font file
.CLP	Clipboard viewer data file
.CMB	Xtree for Windows Button Bar file
.CMF	Sound Blaster synthesised sound file
.CMP	Photofinish Calibration Map
.CNF	Configuration file -- used by many programs  for configuration data with program dependent format
.CNV	Word import converter
.CNT	Windows Help file contents
.COM	Executable Program in small format
.CPD	Microsoft Fax cover document
.CPE	.CPD file
.CPL	Control Panel Apple file
.CPP	C++ source file
.CRD	Windows card-file data file
.CSV	Comma Separated Variables (crude data interchange format)
.CUR	Windows Cursor File
.CUT	Dr. halo bitmap graphics
.DAT	Data file - used by many applications
.DB	Paradox 4.0 database; extension also used by Managing your money
.DBF	Basic dBASE database
.DBS	Data file used by Managing Your Money
.DCT	Dictionary: used by many programs with program dependent format
.DEF	Definition file -- used by many programs with program dependent format
.DFX	Micrografx Effects DLL used in their bitmap editors
.DIB	Device Independent Bitmap; rarely used Windows 3.0 bitmap format
.DIF	Data Interchange Format (used by Visicalc)
.DIR	CPS Backup Directory File
.DIZ	Special file placed in zips to describe shareware that some BBS can read automatically
.DLG	Windows SDK dialogue editor data file
.DLL	Windows Dynamic Link Library
.DOC	Word native file; also used by some other programs and as ASCII file in many shareware programs
.DOT	Word template file
.DRV	Windows driver
.DRW	Designer vector graphics file
.DS	TWAIN (Scanner spec) data source DLL
.DSP	Norton viewer DLL
.DVI	Device Independent file made by TeX
.DXF	AutoCAD vector graphics format
.ENV	Envelope or Environments; used by may programs with program dependent format
.EPS	Encapsulated PostScript File
.EXE	Executable program
.FAS	Macsyma compiled program
.FAX	Fax bitmaps in CCITT format
.FF	Intelligont FIAS format
.FI	Fortran Source Code
.FIL	Mirror.fil is the name given to the saved FAT by the mirror program included in some versions of DOS and in PCTools
.FIO	Image PALS viewer DLL
.FLT	Filter; DLL used by Alsud and Word for import; used in other contexts by many other  programs with program dependent format
.FNT	Font file; used by many programs for proprietary format files
.FON	Windows bitmap font file
.FOR	FORTRAN Source Code
.FOT	TrueType font resource file
.FRM	Visual Basic Form
.FRX	Visual Basic binary program file
.GBL	Global module in Basic programs
.GEM	Gem Vector graphics format
.GFX	Instant Artist graphics Files
.GIF	CompuServe' Graphics Interchange Format (bitmap graphics)
.GLB	Global module in Basic programs
.GLO	Global module in Basic programs
.GLY	Word Glossary
.GRF	Stanford Graphics files; also used by Charisma
.GRP	Windows Program group file
.GV	GrandView outline file
.H	C header file
.HBK	MathCAD handbook
.HLP	Windows Help file
.HST	History file; used by various programs, especially games, with program dependent format
.HTM	HyperText Mark-up Language Format (Internet) file
.HTML	HyperText Mark-up Language Format (Internet) file
.ICO	Icon file
.ICM	Interface Colour Matching file
.IFF	Amiga bitmap format
.IL	hDC Designer Icon Library (in DLL format)
.IMG	GEM bitmap graphics file
.INF	Information file; used by various programs, including Windows with program dependent formats
.INI	Initialisation file for a Windows program
.JPG	JPEG compressed bitmap graphics format
.KEX	Kedit Macro File
.KML	Kedit Macro Library
.LEX	short for lexigographic; dictionaries and other files; used by several programs with program dependent format
.LGO	Windows Logo file shown during start-up
.LHA	File made by compression LHA
.LIB	Library file
.LIC	license file used by some programs to put their license on disk
.LZH	File made by the compression program LHARC
.M	Source file for MatLab and Mathematica
.MA	Used by Mathematica for its notebooks and by hDC products for MicroApp executable files
.MAC	MacPaint bitmap; also used for many programs for macro files with program dependent format
.MAK	Make file -- list of source files for a project in some languages together with compiler directives
.MAP	File with debug information produced by some languages
.MCD	MathCAD file
.MDB	(Microsoft Access database
.MID	MIDI music file
.MMM	Multi-Media Movie file
.MNU	Microsoft Mouse menu (for DOS apps)
.MOD	Module -- used by Windows for DLL which implement DOS support
.MPG	Video compressed files (VideoCD)
.MSG	Message - used by several different CompuServe access programs to store messages with program dependent format
.MSP	Microsoft Paint format (from Windows 2.x)
.MU	Quattro pro for DOS Menu definition file
.MXL	PackRat 5.0 support DLLs
.NCD	Norton's hard drive trees
.NDX	dBase index file
.NFO	Filioview database
.NL	Norton Desktop Icon Library
.NSS	Norton Screen Saver module
.OBJ	Compiled machine language code
.OPT	Options; name used by many programs for configuration information
.OVL	Overlay -- used by DOS executables for storing code on disk to swap in as needed
.PAK	PAK compressed format
.PAL	Palette file; used by many programs, each with their own format
.PCD	Kodak PhotoCD file
.PCX	PC paintbrush bitmap format
.PDB	Packrat 5.0 data file
.PDF	Adobe's Portable Document Format
.PDG	Print Shop Deluxe data file
.PFA	PostScript Font File
.PFB	PostScript Font File
.PFM	PostScript Font Metric File
.PGL	HP Plotter vector graphics format
.PIC	123 Vector Graphics format
.PIF	Windows Program Information File
.PM3	PageMaker 3.0 data file
.PR1	Packrat 4.0 data file
.PR2	Packrat 4.x data file
.PRN	Spreadsheet output (printer file(
.PRO	Profile; used by many programs to store configuration data
.PRS	Norton Viewer DLL file
.PS	Postscript output file
.PSD	Photoshop bitmap file
.PX	Paradox 3.0
.QAG	Norton Desktop Group file
.R2D	Reflex 2 data file
.RAS	Sun Raster format
.RC	Resource script used by Windows programs
.REC	Windows Recorder Macro File
.REG	File used by programs to add material to the Windows registration database using RegEdit
.REP	Report file used by many applications
.RES	Compiled resource file
.REX	Rexx language source file
.RIF	Fractal painter bitmap file
.RLE	Run Length Encoded compressed BMP file
.RMI	Windows alternate synthesised sound format
.ROL	Adlib format synthesised music file
.RPB	data report file used by CP Backup
.RPT	Report file used by many applications
.RSL	Resource Library used by PC Tools for Windows
.RTF	Rich Text Format file
.RTS	Realizer executable file
.RUN	PC Tools for Windows batch file
.RXD	Reflex 1 data file
.SAM	Ami Pro data file 
.SCD	SCODOL film recorder
.SCR	Windows Screen Saver module, also used by WinCIM
.SDW	Ami Draw Symbol File
.SET	Extension used by Norton Backup and CPS Backup for set-up information
.SFB	HP Soft font (obsolete under Windows)
.SFO	Bitstream font file - fontware format
.SKY	SYLK Spreadsheet file (used by Multiplan)
.SMM	Ami Pro Macro File
.SND	Mac/Amiga digitised sound file
.SPD	Bitstream font file - speedo format
.STY	Ami Pro Template (Style); used by other programs for `styles`
.SY3	Harvard Graphics format
.SYD	Sysedit backup file
.SYS	System file, used for config.sys and device drivers
.TBL	Short for Table; used by many programs
.TDF	Speedo font file
.TEX	TeX source file
.TFM	TeX font file
.TGA	Targa True Colour bitmap format
.THM	Picture Publisher or PhotoMagic Thumbnail
.TIF	TIFF (tagged image format file) bitmap file
.TMP	Temporary File
.TPU	Turbo Pascal Unit (pre-compiled Turbo Pascal module)
.TRM	Windows Terminal data file
.TRU	True Basic source file
.TTF	True Type Font file
.TXT	Common name for ASCII text file
.VBR	Visual Basic Custom Control file
.VBX	Visual Basic Custom Control file
.VOC	Sound Blaster digitised sound file
.VSD	Visio Drawing
.VSS	Visio Template
.VST	Visio Template
.VXD	Windows Virtual Device Driver
.WAS	ProComm Script File (source code)
.WAV	Windows digital sound file
.WAX	ProComm compiled script
.WB1	Quattro Pro for Windows Spreadsheet Notebook
.WBT	Wilsonware Batch file used by Winbatch and Norton Desktop
.WCM	WordPerfect Macro File
.WD	InfoSelect Data file
.WK3	Lotus 123 3x spreadsheet
.WK4	Lotus 123 4x spreadsheet
.WKI	Lotus 123 2x spreadsheet
.WKQ	Quattro spreadsheet
.WKS	Lotus 124 1.x spreadsheet
.WMF	Windows Metafile vector graphics format
.WMP	Windows Magic Icon Palette
.WNF	Corel Draw Font File
.WP	Word Perfect Format
.WPG	WordPerfect Graphic (vector graphics)
.WQ1	Quattro Pro for DOS spreadsheet
.WR1	Windows Write file
.WRK	Lotus symphony Spreadsheet
.WS	APL Worksheet
.XCL	Xtree for Windows Script file
.XLA	Excel Addin
.XLB	Excel Toolbar
.XLC	Excel Chart
.XLL	Excel Addin
.XLM	Excel Macro File
.XLS	Excel spreadsheet file
.XLT	Excel Template
.XLW	Excel Workbook
.ZIP	PKZIP compressed file format
.ZOO	ZOO compressed file format