.AI -- Adobe Illustrator image file (PostScript) .AU -- the most common sound format found on the Internet; commonly used by NeXT and UNIX computers; use WPlany, a versatile sound player that plays .AU, .IFF, PC raw .SND, .VOC, and .WAV format files, to play .AVI -- Microsoft's Video for Windows Audio Visual Interleaved format; allows both audio and visual information; can be played using the MS-WINDOWS Media Player .DOC -- MS-WORD for Windows DOCument .DWG -- AutoCAD DraWinG format .DXF -- AutoCAD Data eXchange File .EPS -- Encapsulated PostScript .FLI -- Animation format; popular for fractal animations; use MS-WINDOWS Media Player or AAplay, a Windows-based application for playing FLC/FLI animations, but that also extends the Windows Media Player to include these animation formats. .FLC -- same as .FLI .GIF -- The CompuServe Graphics Interchange Format (pronounced "jiff"); provides built-in file compression; very popular format on the Web; use LView, a package for viewing multiple formats of pictures, including JPEG, BMP, GIF, TGA, etc., to view .HTML (and .HTM) -- HTML is HyperText Markup Language, the coding language of the WWW; plain text file; use a Web browser or HTML editor to view .JPG -- Joint Photographic Experts Group, a 24-bit graphic format; use LView or WinJPEG to view .JPEG -- same as above .JPE -- same as above .JFIF -- same as above .MOV -- Quicktime Movie format; Apple Macintosh native movie format; use Quicktime for Windows to view .MOVIE -- Silicon Graphics Movie format .MPEG -- (preferred) MPEG (Moving Picture Experts Group) is the standard movie/video format for the WWW; use Mpegplay to view .MPG -- same as above .MP3 -- (preferred) MPEG audio .PDF -- Adobe's Portable Document Format; use the free Adobe Acrobat Reader to view .PNG -- Portable Network Graphics .PS -- PostScript .QT -- Quicktime Movie format; Apple Macintosh native movie format; use Quicktime for Windows to view .RTF -- Rich Text Format .SVG -- Scalable Vector Grpahics .TEX -- a TeX file .TIF -- TIFF (Tagged Image File Format) is a very large high quality image format; use LView or WinJPEG to view .TIFF -- same as above .TXT -- a plain (read: ASCII) TeXT File such as those created with the MS-WINDOWS Notepad or other ASCII text editor .WAV -- Microsoft WAVeform format for use with Windows; use WPlany to play (or MS-WINDOWS Media Player) .XLS -- Excel for Windows spreadsheet