| fpj | Adobe RoboHelp Folder Contents |
| fplist | Microsoft Frontpage List Data |
| fpp | FPS Creator Prefab Data |
| fpq | Fluke Power Logger Data |
| fpqo | Fluke PowerLog 5 Data |
| fps | FME Feature Store Pointcloud Sidecar File |
| fpsl | FileMaker Pro Snapshot Link |
| fpsml | PSML Fragment Definition |
| fpt | Alpha Five Memo Data |
| fptheme | Microsoft Frontpage Theme Data |
| fpv | Flytrex Core Fly Log |
| fpz | IBM Rational Focal Point Data |
| fq | FASTQ Sequence |
| fqf | FlashFXP Queue Data |
| fqm | Mental Ray Renderer Result Data |
| fr | STK Frequency Information File |
| fr3 | Fractal Explorer 3D Attractor |
| fr3d | FaceGen 3D Model |
| fr4 | Fractal Explorer Quaternion Spot |
| fra | Adobe Acrobat Reader French Language Data |
| fra | Fractal Explorer Animation |
| frac | Tinker Fractional Coordinates |
| fract | Free Form Fractional Chemical Data |
| frag | SAM A2M Alignment Data |
| fragment | IBM DB2 Fragment Data |
| frames | xScope Frames File |
| frb | Microsoft FRx DrillDown Viewer Report Book |
| frd | Frequency Response Data |
| frd | Mandelbrot Explorer Fractal Definition File |
| frd | Microsoft FRx DrillDown Viewer Enhanced XML |
| frdat | Abbyy FineReader Data |
| frec | Fiasco Database Frequencies File |
| fred | Flight Recorder Electronic Documentation Data |
| freq | SAM Frequency Model Data |
| fres | Autodesk Inventor Stress Analysis Results Data |