Suffixes used on Windows computers - partial list:
Image Files
.tif TIFF image file
.jpg JPEG image file
.eps Encapsulated Postscript file
.psd Photoshop document
.gif Compuserve GIF image file
.pct Macintosh PICT image file
.png Portable Network Graphics file
.pcx PC Paintbrush bitmap image file
.mac Macpaint bitmap file
.fpx Kodak Flash Pix file
.bmp Microsoft Bitmap image file
.wmf Microsoft Windows metafile
.tga Targa image file
.sct Scitex bitmap files
.pxr Pixar image file
.cdr CorelDraw file
.fh5 Freehand version 5 file
.ai Adobe Illustrator file
Multimedia Files
.mpg MPEG compressed video
.mov QuickTime movie -or-
.qt QuickTime movie
.pic QuickTime picture (I suspect that this is same as a PICT file)
.avi Microsoft Video movie
.wav Wave audio sound recordings
.aif sound file -or-
.aiff sound file
.mid MIDI synthesized sound
.cst Macromedia Director cast files
.dir Macromedia Director movie files - Note: this might be bad form in
DOS land. DIR is reserved for directories (folders), and is a command that lists the
contents of a folder.
.cxt Macromedia Director protected cast files
.dxr Macromedia Director protected movie files
.skl Macromedia Director resources
.prf Macromedia Director settings
.cct Macromedia Shockwave Cast files
.dcr Macromedia Shockwave movie
.spl Shockwave Flash object -or-
.swf Shockwave Flash object
.htm Web document -or-
.html Web document
.ra Real Media file -or-
.ram Real Media file -or-
.rm Real Media file
Text Files
.txt plain text file (generic text - no formatting)
.doc Microsoft Word document
.wpd WordPerfect document (WordPerfect doesn't need an extension, but
it's good form)
.wri Microsoft Write applet document
.rtf Rich Text document
Page Layout Files
.qxd QuarkXpress file
.pm5 PageMaker version 5 file
.pm6 PageMaker version 6 file
.p65 PageMaker version 6.5 file
.ind InDesign version 1.5 file -or-
.indd InDesign version 1.5 file
Fonts
.pfb Postscript outline files
.pfm Postscript font metric files
.mmm Postscript Multiple Master font files
.ttf TrueType font file
Other
.exe programs
.dll dynamic linked libraries for programs
.sys operating system files
.scr screen saver file
.drv device drivers for operating system
.zip ZIP compressed files
.pdf Adobe Acrobat files
.pt Kodak precision transform color correction file
.icc color profile -or-
.icm color profile (preferred)
.fp3 FileMaker Pro version 3 database
.fp5 FileMaker Pro version 5 database