| fml | OFML Scene Data |
| fmm | FreeMind MindMap |
| fmod | Adobe Illustrator Flattening Module |
| fmp | FileMaker Pro Data |
| fmp12 | FileMaker Pro 12 Database |
| fmp3 | FileMaker Pro for Mac Database |
| fmpp | FLAMES Model Prototype Data |
| fmpsl | FileMaker Pro 12 Snapshot Link |
| fmpur | FileMaker Pro Runtime Solution |
| fms | FARSITE Moisture Data |
| fmsh | Autodesk Inventor Mesh Data |
| fmt | GAUSS Engine Matrix Data |
| fmtr | FileMaker Pro Transfer Data |
| fmu | Functional Mock-up Unit Data |
| fmv | FME Desktop Viewspace Data |
| fmw | FME Workbench |
| fmwt | FME Desktop Workbench Template |
| fmx | FME Desktop Custom Transformers Data |
| fmxlist | FME Desktop User-defined Transformer List |
| fn | STK Facility Networks File |
| fna | FASTA Sequence |
| fnbk | Food Network Recipe Manager Data |
| fnc | Frogans Player Network Certificate |
| fnet | FileMaker Pro Network Data |
| fng | Font Navigator Group Data |
| fnl | EES File Names List |
| fnm | SOBEK Filenames Data |
| fnm | Lucene Field Name Data |
| fno | Folio Infobase Data |
| fnrecipes | Food Network Recipe Manager Data |
