| Abbreviation | Definition |
|---|---|
| FESS | File Exploit Scanning System |
| FEV | FLAMES environment variable file (Ternion Corporation) |
| FF | Intelligont FIAS format |
| FF | Outline font description (Agfa Compugraphics) |
| FFF | Fax (defFax) |
| FFI | Atech FastFont (AllType) |
| FFIVW | File Format for the Interchange of Virtual Worlds |
| FFT | DisplayWrite Final Form Text - text file |
| FFT | Fast Fourier Transform analysis data |
| FFT | Text file (DCA/FFT Final Form Text - DisplayWrite) |
| FH3 | Aldus FreeHand 3.x Vector graphics |
| FH4 | Aldus FreeHand 4.x Vector graphics |
| FI | Microsoft Fortran Interface file |
| FIF | Graphics (Fractal Image Format) |
| FIG | Linker options (Lahey Fortran) |
| FIL | File listing |
| FIL | File template (Application Generator) |
| FIL | Files list object file (dBASE Application Generator) |
| FIL | Overlay (WordPerfect) |
| FIN | Print-formatted text file (Perfect Writer - Scribble - MINCE) |