File Name Extensions - File Format

A friend sends you some files that have to be output and upon opening the folder, you notice it is filled with .qrw files. What the hell are .qrw files? Below is an overview of filename extensions.

A-B - C-D-E - F-G-H - I-J-K - L-M-N - O-P-Q - R-S-T - U-V-W - X-Y-Z


.a11	graphics AIIM image file
.acb	ACMB graphics
.adc	ScanStudio bitmap graphic (16 colours)
.adf	Amiga disk file that stores the contents of an entire Amiga floppy in a single binary file.
.afm	Adobe Font Metric file, used to provide information on Adobe fonts.
.ai	Adobe Illustrator drawing
.aiff	audio interchange file
.aif	audio interchange file
.amg	Actor system image file
.anm	Delux Paint Animator animation
.ans	ANSI graphics (for character animation)
.apd	Aldus PageMaker document
.arc	file compressed using the arc program. It can be decompressed by several utilities on the market.
.ark	file compressed using the arc program. It can be decompressed by several utilities on the market.
.arj	file compressed using the arj program. It can be decompressed by several utilities on the market.
.art	First Publisher raster graphic
.asf	ActiveMovie Streaming Format, an internet distribution format from Microsoft which adds video to selected portions of an audio file.
.asc	plain ASCII textfile, can be opened in any editor or wordprocessor
.au	audio format that originated on UNIX systems
.avi	Audio Video Interleaved animation file (for Video for Windows)
.awk	script that uses the AWK language
.awm	Animation Works movie
.bak	backup file
.bar	Unix archive, similar to tar
.bas	code file for the Basic programming language
.bat	batch file for the MS-DOS operating system. May also work on Windows systems.
.bbs	Bulletin Board System announce or text info file
.bdf	bitmap distribution format, a file used for storing bitmapped fonts on Unix systems
.bga	bitmap graphics file
.bin	file saved using Macintosh MacBinary encoding
.bio	OS/2 bios file
.bmp	Microsoft bitmap image format, can be opened in PhotoShop.
.bob	General graphics data-format for storing an uncompressed 256-color palette-type picture image
.bpt	Corel Draw bitmap fills file
.bsh	Bourne Shell script or Bourne-Again Shell script for Unix systems
.bz2	file compressed using the bzip2 program


.c	source file written in the C++ programming language
.cab	Cabinet file, non-proprietary format used for automatic Internet Component Download by Web browsers, such as the Microsoft Internet Explorer. Can be opened with Microsoft's Cabinet File Viewer, an application bundled with PowerToys.
.cdr	Corel Draw vector graphics drawing
.cfg	general extension for a configuration file
.cgi	common gateway interface file
.cgm	computer graphics metafile, an image file
.chk	WordPerfect for Windows temporary file
.chr	generic extension indicating "character" data
.clp	contents of the Windows 3.1 clipboard
.cmd	OS/2 batch file
.cmv	Corel Move animation
.cmx	CorelDraw Clip Art document file format (v5.0)
.com	command file, a program for an MS-DOS or Windows system
.cpi	ColorLab image bitmap graphics
.cpp	source file written in the C++ programming language
.cpt	file compressed using Compact Pro (on a Mac)
.csh	C-Shell script for a Unix system
.css	cascading style sheet file, used to define a cascading style sheet for a web page
.ct	contone file, may be part of a TIFF/IT file
.cvs	Canvas graphics file
.cwk	AppleWorks (or ClarisWorks) document that can contain text, a spreadsheet, a database, a presentation or a drawing
.cws	AppleWorks stationery
.cxx	source file written in the C++ programming language
. .dat	generic extension for a data file (often ASCII)
.dcs	CMYK image file, can be opened in PhotoShop
.dem	generic extension for a demo file
.dib	device-independant bitmap graphics file
.dic	generic extension for a dictionary file
.dll	Windows dynamic link library, deleting one of these can damage MS Windows !
.dmf	file containing vector fonts for Amiga systems
.doc	generic extension indicating some sort of text document, usually in ASCII. Both FrameMaker and MS-Word often save their native format files with this extension as well.
.dos	text file containing MS-DOS specific information
.drv	generic extension for a driver (eg for a printer or other device)
.dsm	DSI digital sound module
.dwf	DEC Windows Format, a format for storing bitmapped fonts on DEC UNIX systems
.emf	Windows enhanced metafile, a format for graphic data
.enc	Encore music file
.eps	encapsulated PostScript file that can contain text, bitmap images and vector data.
.err	generic extions for an error log file, usually ASCII
.exe	a program for an MS-DOS or Windows system


.f3	Sun Folio format, used for storing vector fonts on Sun UNIX systems
.f3b	Sun Folio format, used for storing vector fonts on Sun UNIX systems
.f66	source file written in the FORTRAN programming language
.f77	source file written in the FORTRAN programming language
.f90	source file written in the FORTRAN programming language
.fac	Face graphics file
.faq	ASCII document that answers frequently asked questions.
.fax	generic description for a fax saved as a graphics file
.fit	FITS graphics file
.fix	generic description for a patch file
.fla	Macromedia Flash file; containing flash graphics used on web pages
.fm	FrameMaker file
.fp	final page file, may be part of a TIFF/IT file
.fpx	Kodak FlashPix image
.ftk	FastTrack audio data
.ged	EnerGraphics graphics editor file
.gf	generic font file for a system running TEX
.gif	general image format file, containing an image or simple animation. These files can be opened in PhotoShop.
.gmf	Applause CGM graphics file
.gz	compressed file. Can be decompressed using any of the utilities on the market that support ZIP-compression.
.h	header file written in either C or C++
.hdf	hierarchical data format file, it supports the storage of many different data types, including images and tables. On most platforms, tools are available that can handle HDF files.
.hlp	generic extension for a help file
.hqx	BinHex file. Binhex encoding originated on Macintosh. It is used when files are transfered on internet or via email. Binhex decoders can be found for Windows, MS-DOS and UNIX as well as Macintosh.
.htm	hypertext markup language file (a web page)
.html	hypertext markup language file (a web page)


.iax	IBM Image Access Executive graphics file
.icn	Icon source code file
.ico	Windows 3.x icon file
.id	disk identification file
.idw	IntelliDraw vector graphics file
.idx	index file for database
.iff	image file format containing a bitmap image
.img	Ventura Publisher bitmap graphics file
.iso	file containing the entire content of a CD, can be read may many cd-writer applications.
.jar	Java archive
.java	file written in the Java language
.jbg	image file, optimized for FAX type images. Free viewing programs are available for most platforms.
.jbig	image file, optimized for FAX type images. Free viewing programs are available for most platforms.
.jpeg	image, compressed using the JPEG compression algorithm
.jpg	image, compressed using the JPEG compression algorithm
.js	file containing JavaScript data
.jtp	TIFF bitmap file with Jpeg compression applied
.key	keyborad macro
.ksh	Korn Shell script for a Unix system


.lbr	Lotus 1-2-3 display driver
.lgo	Windows 3.x startup logo code
.lib	generic extension for "library" data
.lw	linework file, may be part of a TIFF/IT file
.lwf	image file
.mac	generic extension for macro file
.map	Linker map file
	Atlas Mapmaker map
.mem	Wordperfect macro editor macro file
.mf	MetaFont file, used to store font information for Tex systems
.mid	musical instrument digital interface file (audio file)
.midi	musical instrument digital interface file (audio file)
.mif	maker interchange format file, a type of FrameMaker file
.miff	ImageMagic image file
.mki	Magview japanese graphics file
.mmm	MacroMind Director 3.x movie file
.mod	audio module file, can be played on all platforms
.mov	QuickTime file, containing either a movie or sounds
	AutoCad Autoflix movie
.mp2	mpeg compressed audio file
.mp3	mpeg compressed audio file
.mpg	mpeg compressed movie
.msg	generic extension for message file
.msp	MS Paint bitmap graphics file
.mus	Musictime sound file
.mvi	AutoCad Autoflix movie command file
.nap	VideoShow file
.new	generic description for file containing new information


.old	generic description for old backup file
.otf	OpenType font containing PostScript Type 1 font data
.out	output file
.pas	source file written in the Pascal programming language
.pbm	portable bitmap format file, ian ASCII image format designed primarily to be portable across different platforms.
.pcd	Kodak PhotoCD image
.pcf	Portable Compiled Format file, containing bitmapped fonts for X-windows systems
.pcx	Paintbrush bitmap graphics file
.pdd	PhotoDeluxe Data image
.pdf	Portable Document Format file, can be opened using Acrobat Reader, a freeware program that can be downloaded from the Adobe website
.pfa	PostScript font ASCII file, used for storing vector fonts on the X-Windows system
.pfb	PostScript font binary file, used for storing vector fonts
.pfm	printer font metric file, used to provide font information on an Windows machine
.pgm	portable graymap format file (an ASCII image format)
.phtml	similar to shtml but not as common
.pict	Macintosh bitmap picture format
.pct	Macintosh bitmap picture format
.pic	Macintosh bitmap picture format
	Pixar picture file
.pk	TEX packed font file, used for storing bitmapped fonts
.pkg	probably a Newton package (remember Newton, the next big thing from Apple?)
.pl	Perl script, a program written in the Perl language
	TEX property list file
.pm3	Adobe PageMaker 3.x document
.pm4	Adobe PageMaker 4.x document
.pm5	Adobe PageMaker 5.x document
.png	portable network graphics image, can be opend in PhotoShop
.ppm	portable pixmap file, contains an ASXII-encoded image
.pps	PowerPoint Show file (If you have problems downloading a pps files see this link
.ppt	Microsoft PowerPoint document
.press	source files for the Newton Press program
.ps	Postscript file
.psd	Adobe PhotoShop file, containing an image. Can be opened in some other image manipulation programs.
.puz	Microsoft Publisher packaged file
.pxr	Pixar image, can read by numerous different image manipulation programs for several different platforms.
.qt	Apple QuickTime movie
;qxd	Quark XPress document


.ras	Sun rasterfile format (old image file format)
.reg	Windows 3.x OLE registration
	Corel registration file
.rem	general extension for a file containing remarks
.rif	Fractal Design Painter bitmap graphics file
.rip	BBS graphics file
.rtf	rich-text format file, can be opened in Word or imported in Xpress or PageMaker (provided the necessary filter is installed)
.sav	backup file
.scr	Windows 3.x screen saver file
.sda	self-dissolving archive contains compressed data that should in theory decompress itself when run. StarOffice also saves its drawing program documents with this extension
.sdc	StarOffice spreadsheet document
.sdd	StarOffice presentation
.sdw	StarOffice word processing document
.sea	self-extracting archive, mainly used on Mac but decompression is also possible on Windows systems. Doubleclicking it should decompress the data. Can be created using Stuff-it
.sfl	SoftFont file, used for storing bitmapped fonts for HP printers
.sfp	SoftFont file, used for storing bitmapped fonts for HP printers
.sfs	SoftFont Scalable font file, used for storing vector fonts for HP printers
.sfx	self-extracting archive
.sh	Bourne Shell script
.shar	group of files that are combined into a single file, mostly used on Unix systems
.sha	group of files that are combined into a single file, mostly used on Unix systems
.shm	HTML file utilizing server-side includes
.shtml	HTML file utilizing server-side includes
.sid	audio file. Free SID players are available for most platforms.
.snf	server normal format, used for storing bitmapped fonts
.sng	Midisoft Studio song
.spd	Bitstream Speedo format file, used for storing vector fonts on the X-Windows system
.swf	Macromedia Flash animation, used on web pages
.tar	groups of files combined into one file, created using the tar program
.tcl	program written in the Tcl programming language
.tem	template file written in the C++ programming language
.tgz	group of files that have been combined (using tar) and then compressed (using gzip)
.tiff	image saved using the tagged image file format, can be opened in most image manipulation programs
.tif	image saved using the tagged image file format, can be opened in most image manipulation programs
.tmp	generic xtension for a temporary file
.toc	table of content file
.ttf	Truetype font file, used for storing vector fonts. .TTF is also used for OpenType fonts containing TrueType font data.
.txt	generic extension for simple text files (usually ASCII)
.text	generic extension for simple text files (usually ASCII)


.ul	uLaw audio file
.uu	uuencoded file, converted from binary to ASCII so it can be safely transported across the internet or via email. Uuencoding originated on Unix systems but encoders and decoders are now available for virtually every computer platform. Unfortunately it was never really standardized, so sometimes uudecode on one machine will not properly work on something that was uuencoded on another.
.uue	uuencoded file, converted from binary to ASCII so it can be safely transported across the internet or via email. Uuencoding originated on Unix systems but encoders and decoders are now available for virtually every computer platform. Unfortunately it was never really standardized, so sometimes uudecode on one machine will not properly work on something that was uuencoded on another.
.vf	virtual font file, used to store composite font information for machines that have TEX installed
.vga	Windows display driver file
	Windows VGA display font file
.vis	VIS graphics file
.vpg	VPGraphics graphics file
.wav	waveform audio file, one of the most popular audio formats
.wdb	DataViz document
.wk1	Lotus 123-2 document, can be opened in other spreadsheets as well
.wks	Lotus 123-1A spreadsheet
.wmf	Windows metafile, the equivalent of the Macintosh PICT format
.wpd	WordPerfect document, can probably be opened in other wordprocessors as well
.wp4	WordPerfect 4.x document, can probably be opened in other wordprocessors as well
.wp5	WordPerfect 5.x document, can probably be opened in other wordprocessors as well
.wp6	WordPerfect 6.x document, can probably be opened in other wordprocessors as well
.wpg	WordPerfect graphics file
.wpp	WordPerfect document, can probably be opened in other wordprocessors as well


.xbm	X bitmap file, containing small icons
.xls	Excel spreadsheet document
.xmi	compressed extented midi music file
.xpm	X pixmap file, containing small icons
.xwd	X-Windows dump file, similar toa bmp or pict file
.yuv	YUV graphics file
.z	UNIX compressed data
.zgm	Zenographics graphics file
.zip	file compressed using the zip or pkzip program, the sxtandard compression algorithm for PCs

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