| EXT | FILE TYPE | | EXT | FILE TYPE |
| ai | Adobe Illustrator | | php | PHP |
| aiff | audio | | php3 | PHP |
| ani | animated cursor | | php4 | PHP |
| arj | ARJ | | pl | Perl |
| art | AOL compressed graphic file | | ply | image |
| asf | Windows Media | | png | image |
| asm | ASM | | pps | Microsoft PowerPoint |
| asx | streaming media | | ppt | Microsoft PowerPoint |
| au | audio | | prc | Corel Presentation |
| avi | video | | ps | PostScript |
| bas | Basic source code | | psd | PhotoShop |
| bin | binary | | pub | Microsoft Publisher |
| blz | bitmap graphic | | qt | QuickTime MooV |
| bmp | image | | ra | RealAudio |
| c | Canvas | | ram | RealAudio (or Video) metafile |
| cab | FutureSplash | | rm | RealMedia |
| cdf | IE Channel Definition Format | | rmf | audio |
| cdr | CorelDraw image | | rmvb | RealVideo |
| chat | IRC data | | rmx | RealJukebox |
| class | Java class file | | rp | image |
| cnf | E-cash | | rpm | RealMedia plugin |
| cod | FORTRAN/Multiplan/dBASE | | rt | RealText |
| config | configuration file | | rtf | Rich Text Format |
| css | cascading style sheet | | s3m | sound |
| cur | Windows cursorc | | scm | video |
| dcr | Director | | sdc | StarOffice |
| dir | directory/Procom dialing directory | | sdd | StarOffice |
| doc | Microsoft Word | | sdw | StarOffice |
| dwt | Dreamweaver template | | sit | Mac compressed file |
| dxr | Director | | smi | SMIL |
| eot | embedded OpenType font | | smil | SMIL |
| eps | Adobe Illustrator text and graphics | | spl | Macromedia Shockwave |
| ev | Echoview | | svg | image |
| evy | Corel Envoy document | | svr | compressed virtual world for WWW |
| far | Farandole Composer module | | swa | Macromedia Shockwave |
| fla | Flash | | swf | Macromedia Shockwave |
| flp | CorelFlow flow chart | | tgz | g-zipped TAR |
| frm | Visual Basic source file | | tif | image |
| ged | image | | tiff | image |
| gif | image | | tmb | Timbuktu Pro |
| gz | compressed file | | tmp | temporary |
| hdml | handheld device markup language | | tms | Telemate script |
| hlp | HeLP file | | tsp | TrueSpeech |
| hqx | Mac BinHex | | txt | ASCII text |
| htm | HTML | | utf8 | Microsoft FrontPage |
| html | HTML | | vac | Oc2.316s Cakit |
| hwp | Hangul (Korean) | | viewlet | Viewlet |
| ico | icon image | | viv | video |
| inc | inc include file | | vivo | video |
| inf | inf OS/2 setup file | | vox | sound |
| it | Impulse Tracker module | | wav | sound |
| ivr | image | | wax | Windows Media |
| ivs | video | | wdb | Microsoft Works |
| jar | Java archive | | wk1 | Lotus 1-2-3 |
| java | Java | | wk2 | Lotus 1-2-3 |
| jcz | Microsoft Liquid Motion | | wk3 | Lotus 1-2-3 |
| jpe | JPEG image | | wk4 | Lotus 1-2-3 |
| jpeg | JPEG image | | wk5 | Lotus 1-2-3 |
| jpg | JPEG image | | wki | Lotus 1-2-3 |
| js | JavaScript | | wks | Lotus 1-2-3 |
| key | keyboard macro | | wku | Lotus 1-2-3 |
| lbi | Dreamweaver library item | | wma | Windows Media |
| log | log file | | wmf | Windows Media |
| lwp | Lotus Word Pro | | wml | WML |
| m4a | MPEG audio | | wmv | Windows Media |
| map | image map | | wmz | Windows Media |
| mdb | Access | | wp5 | Corel WordPerfect |
| mid | MIDI sound | | wp6 | Corel WordPerfect |
| midi | MIDI sound | | wp7 | Corel WordPerfect |
| mod | music | | wpl | Windows Media |
| mov | QuickTime MooV | | wps | Microsoft Works |
| mp2 | MPEG audio | | wri | Microsoft Write |
| mp3 | MPEG audio | | wrk | spreadsheet |
| mpa | MPEG audio | | wrl | VRML |
| mpeg | MPEG video | | x | LEX source |
| mpg | MPEG video | | xhtml | extensible HTML |
| mpp | Microsoft Project | | xls | Excel |
| mtm | multitracker module | | xml | extensible markup language |
| nav | Microsoft extension | | xsl | FileMaker XML stylesheet |
| opf | FlipAlbum | | xslt | XSL transform |
| pas | pascal | | zip | compressed file |
| pdf | Acrobat Portable Data Format | | |
| pfr | PaintShop Pro | | |
