| Abbreviation | Definition |
|---|---|
| FRP | FormFlow Form |
| FRS | WordPerfect for Windows Screen Font Resource file |
| FRT | Additional (FPT) report description file (FoxPro) |
| FRT | GP-Forth language source code file (GP-Forth) |
| FRX | Form stash file (binary) (Visual Basic) |
| FRX | Main (DBF) report description file (FoxPro) |
| FRZ | Freeze file (EPOC) |
| FS | Usenix FaceServer file Bitmap graphics |
| FSC | FLAMES Scenario file |
| FSC | FLAMES Scenario file (Ternion Corporation) |
| FSD | File System Driver |
| FSF | Free Software File |
| FSL | Form (Paradox for Windows) |
| FSM | Farandole Composer WaveSample Music format |
| FSMS | File Storage Management System |
| FSSD | Sound |
| FST | Linkable program (dBFast) |
| FSX | Data (Lotus 1-2-3) |
| FTI | Fast Track Initiative |
| FTM | Font file (Micrografx) |