| fb | Slim! Compressed Archive |
| fbf | Free Backup Fix Backup Archive |
| fbu | FEBE Firefox Backup |
| fbw | HP Backup Segment |
| fcarch | Final Cut Pro Archive |
| fcx | FCX Archive |
| fcxe | FileCapsule Deluxe Encoded Archive |
| fea | FilZip Encrypted Archive |
| fez | FUND E-Z Backup Archive |
| fgz | Formula Graphics Presentation Archive |
| fim | Icon Heaven Icons Package |
| flatpak | Linux Flatpak Application Bundle |
| fota | Android Firmware Upgrade Package |
| fp8 | Fast PAQ8 Compressed File |
| fpkg | Mac OS X Installer Package |
| fqp | Flip-Q Package |
| frg | FrogTeacher Folder Package |
| frp | FaxRush Package |
| ftr | IRIX File-type Rules Data |
| fwa | Flex.Win Backup File |
| fwarc | FacetWin Disk Archive |
| fwb | FileWrangler Backup |
| fwp | Microsoft Frontpage Web Package |
| fwp | Microsoft SharePoint Designer Web Package |
| gb7 | MASGAU Backup Archive |
| gbm | Genie Backup Manager Archive |
| gca | DGCA Archive |
| gcf | Steam Game Cache File |
| gcf | WinXComp Grouped Compressed Data |
| gem | RubyGems Gem Package |
