June 2011
| .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 | HTML is HyperText Markup Language, the coding language of the WWW; plain text file; use a Web browser or HTML editor to view |
| .HTM | same as above |
| .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 |
| .MP4 | media container format |
| 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 Graphics |
| .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 |