| Abbreviation | Definition |
|---|---|
| FO1 | Font file (Borland Turbo C) |
| FO2 | Font file (Borland Turbo C) |
| FOG | Fontographer Database File |
| FOL | 1st Reader FOLder of saved messages |
| FON | Bitmap FONt file |
| FON | Procomm Plus Log of all Phone calls |
| FON | Telix Phonebook file |
| FONT | Unix Font data |
| FOP | Freedom of Press Bitmap graphics file |
| FOR | Fortran language source code file |
| FOR | WindowBase Form file |
| FOT | Truetype font styles file (installed font) |
| FOX | Foxbase executable (precompiled .prg) (FoxBase) |
| FP | Data (FileMaker Pro) |
| FP | FoxPro Configuration file |
| FP1 | Game data (Flying Pigs for Windows) |
| FP3 | Document (FileMaker Pro 3.0) |
| FPB | FLAMES Playback file |
| FPB | FLAMES Playback recorder file (Ternion Corporation) |
| FPC | FoxPro Catalog |