| . | Usually readme file |
| .### | Temp file (qtic) |
| .#24 | Printer data file for 24 pin matrix printer (locoscript) |
| .#ib | Printer data file (locoscript) |
| .#sc | Printer data file (locoscript) |
| .#st | Standard mode printer definitions (locoscript) |
| .$$$ | Temporary file |
| .$00 | Pipe file (dos) |
| .$1 | Zx spectrum file in hobeta format |
| .$db | Temporary file (dbase iv) |
| .$ed | Editor temporary file (ms c) |
| .$ln | Tlink response file (borland c++) |
| .$o1 | Pipe file (dos) |
| .$vm | Virtual manager temporary file (windows 3.x) |
| .)2( | Lha archiver temporary file (lha) |
| .@@@ | Screen files used in installation or instructions |
| .___ | Table (adinf) |
| .~$~ | Temporary file (1st reader) |
| .~ap | Old appexpert project database (borland c++ 4.x) |
| .~de | Project backup (borland c++ 4.x) |
| .~mn | Menu backup (norton commander) |
| .0 | Compressed harddisk data (doublespace) |
| .000 | - Common filename extension (geos)
- Compressed harddisk data (doublespace)
|
| .001 | Fax (hayes jt fax) (many) |
| .075 | 75x75 dpi display font (ventura publisher) |
| .085 | 85x85 dpi display font (ventura publisher) |
| .091 | 91x91 dpi display font (ventura publisher) |
| .096 | 96x96 dpi display font (ventura publisher) |
| .0b | Printer font with linedraw extended character set (pagemaker) |
| .1 | Unformatted manual page (roff/nroff/troff/groff) |
| .10x | Bitmap graphics (gemini 10x printer graphics file) |
| .15u | Printer font with pi font set (pagemaker) |
| .1st | Usually readme.1st text |
| .24b | Bitmap graphics (24bit data) |
| .2gr | Vga graphics driver (windows video grabber) |
| .301 | Fax (super fax 2000 - fax-mail 96)) |
| .386 | Virtual device driver (windows 386 enhanced mode) |
| .3dm | Quickdraw 3d metafile (quickdraw) |
| .3dmf | Quickdraw 3d metafile (quickdraw) |
| .3ds | Graphics (3d studio) |
| .3fx | Effect (corelchart) |
| .3gr | Vga graphics driver (windows video grabber) |
| .3t4 | Binary file converter to ascii (util3) |
| .4c$ | Datafile (4cast/2) |
| .4md | Musical file |
| .4sw | Swap file (4dos) |
| .4th | Forth language source code file (forthcmp - lmi forth) |
| .668 | Music (the mixing is always at 12048hz) |
| .669 | Music (8 channels mod) (the 669 composer) |
| .6cm | Music (6 channel module) (triton fasttracker) |
| .75 | 75x75 dpi display font (ventura publisher) |
| .8 | Assembly language source code file (a86) |
| .85 | 85x85 dpi display font (ventura publisher) |
| .8cm | Music (8 channel module) (triton fasttracker) |
| .8m | Printer font with math 8 extended character set (pagemaker) |
| .8med | Music (amiga octamed) |
| .8svx | Sound (amiga 8-bit) |
| .8u | Printer font with roman 8 extended character set (pagemaker) |
| .91 | 91x91 dpi display font (ventura publisher) |
| .96 | 96x96 dpi display font (ventura publisher) |
| .a | - Ada language source code file
- Assembly source code (macintosh)
- Object library (unix)
|
| .a11 | Graphics (aiim) |
| .a8 | Alpha channel image data (24bit 3d animation) (cubicomp picturemaker) |
| .ab6 | Datafile (abstat) |
| .ab8 | Datafile (abstat) |
| .abc | - Document (abc flowcharter 1.0)
- General filename extension (abc programming language)
- Musical notation language file (folk melodies)
|
| .abf | Adobe binary screen font (adobe software) |
| .abk | - Automatic backup (coreldraw)
- Avigo backup (avigo)
|
| .abm | Image pals album file |
| .abr | Adobe brush file (adobe photoshop) |
| .abs | - Abstracts (info file)
- Data file (abscissa)
|
| .ac$ | Spooled plot file (autocad autospool) |
| .aca | Project (project manager workbench) |
| .acad | Autocad database file |
| .acb | - Archive (acb)
- Graphics (acmb)
|
| .acc | Program (dr-dos - viewmax) (gem / resident) |
| .acf | Adobe custom filter (adobe photoshop) |
