| fbl | iGO Map file |
| fbl7 | FinalBuilder v7 Project Log |
| fbl8 | FinalBuilder v8 Project Log |
| fbm | CADfix ASCII Geometry Data |
| CADfix Command Level Log |
| CADfix Geometry Database |
| DELFTship Marine Vessel Model |
| fbmod | Frosty Tool Suite Data |
| fbn | Sony-Ericsson Phone Flash Filesystem |
| fbnd | Mac OS X Communication Tool Data |
| fbopts | FileBoss Options Data |
| fbr | Avantes Avasoft v8 Bare Fiber Data |
| BrainVoyager QX Fiber Coordinates Data |
| fbv | GrafNav Exported Binary Values Data |
| fbwins | FileBoss Internal Data |
| fbwinsx | FileBoss Internal Data |
| fbx | MotionBuilder Filmbox Data |
| fc | Harvard Graphics 2.0 Spellchecking Dictionary |
| fc1 | FCEUX Saved State |
| fc2 | FCEUX Saved State |
| Poser Face Data |
| fc3 | FCEUX Saved State |
| fca | Omnis Web Client Form Cache |
| fcat | Fact200 Categories Data |
| fcc | File Conversion Center Conversion Job |
| SiteMinder Forms Credential Collector Data |
| fcd | PFS First Choice Database |
| fcdot | ABBYY FlexiCapture Engine Document Definition |
| fce | Virtual.HairStyle Fab Data |
| fcf | XtalView Xfit Phase Data |
| fcg | GAUSS Engine Compiled Gauss Data |
| fch | Gaussian Formatted Checkpoint File |
| fchc | Fetch Cache Data |
| fchk | Gaussian Formatted Checkpoint File |
| fci | Erosion 3D Inflow Table |
| Fiery Clone Tool Image |
| fciv | Microsoft File Checksum Integrity Verifier Data |
| fcl | FidoCAD Library |
| fcm | Brother ScanNCut Data |
| Factory Commander Model Data |
| FCEUX FCE-Ultra Capture Movie |
| FidoCAD Macro Data |
| fcod | Adobe PageMaker Filter Data |
| fcp | FLAMES Checkpoint Restart Data |
| fcpcache | Final Cut Pro Cache Data |
| fcpevent | Final Cut Pro Event Data |
| fcpxdest | Final Cut Pro Share Destination Data |
| fcs | Canon ZoomBrowser EX Data |
| Faircom c-treeACE Server Data |
| FCEUX Saved State |
| Flow Cytometry Standard Data |
| Rapidform Polygon Faces Data |
| fcst | Delft-FEWS Forecast Data |
| fct | Campaign Cartographer Data |
| FolderClone Task List |
| fcw | Campaign Cartographer v2 Data |
| fcxr | FileCapsule Deluxe Data |
| fcxu | FileCapsule Deluxe Data |
| fcz | Poser Compressed Face Data |
| fd | DataFlex Data File |
| LaTeX Font Definition Data |
| STK Facility Database Main File |
| fd1 | Windows Live Photo Gallery Thumbnail Database |
| fdat | Fiasco Database Data File |
| fdata | NONMEM Data |
| fdb | Art Explosion Image Catalog Database |
| Firebird SQL Database |
| FormTool Pro Form Data |
| Microsoft Dynamics NAV Database |
| Navision Financials Database |
| Portfolio Catalog Data |
| fdc | Autodesk AutoCAD Fields Description |
| McAfee Sniffer Capture Data |
| fdd | FlexiDATA Database |
| fde | AFP Form Definition |
| FLAMES Dataset Export Data |
| fdf | Format Description File |
| Origin Fitting Function Definition File |
| fdff | Fast Duplicate File Finder Data |
| fdi | FormDocs Index |
