| fhm | ASIP Meister Data |
| fhs | Adobe Flash FlashHelp Skin Data |
| fhz | Adobe Flash FlashHelp Compressed Skin Data |
| fi | Fortran Interface File |
| fi | Gforth Image File |
| fic | WinDev HyperFileSQL Database |
| fig | MATLAB Figure |
| fil | ProWorx NXT Format Export |
| filters | Visual C++ Project Filters |
| fimpp | FiM++ Source Code |
| fky | Microsoft Visual FoxPro Macro File |
| fla | Shockwave Flash Source File |
| flag | GCC Flags Data |
| flags | GCC Flags Data |
| flash | Shockwave Flash Source File |
| flb | EasyBuilder Pro Picture Library |
| flbx | EasyBuilder Pro Picture Library |
| fll | Visual FoxPro DLL |
| flm | Flasm Disassembled SWF |
| fly | Fly Script |
| fmb | Oracle Forms Form Module Binary |
| fmdl | Konami Fox Engine Model |
| fmg | Harbour MiniGUI IDE Form |
| fmo | dBASE IV Compiled Object |
| fmt | IAR System Formatting Data |
| fmt | Oracle Forms Form Module Text |
| fmt | Uniface Format Data |
| fmx | Oracle Forms Form Module Executable |
| fn | GCL Cross Referencing Data |
| fo1 | Borland Turbo C Font Data |
| fo2 | Borland Turbo C Font Data |
| fon | Hitachi Ladder Editor Force File |
| footer | WebSTAR Directory Indexer Footer |
| for | Fortran Source Code |
| form | Gambas V2 Form |
