| raes | TrueZIP Encrypted Archive |
| rar | WinRAR Archive |
| rdar | Reflection Desktop Customization Archive |
| rem | BlackBerry Encrypted File |
| rev | WinRAR Recovery Volume |
| rge | Microsoft Entourage Archive |
| rhi | Rhino3D Installer Package |
| rk | RK Compressed Archive |
| rkv | Rkive Compressed Archive |
| roa | Remark Office OMR Archive |
| rox | Remark Office OMR Archive |
| rp1 | RSLogix 5 Compressed Project Backup |
| rp9 | RetroPlatform Disk Image Archive |
| rpa | RenPy Archive |
| rpak | RPAK Archive |
| rpm | RPM Package |
| rpmnew | RPM Package Manager Package Backup |
| rpmorig | RPM Package Manager Package Backup |
| rpmsave | RPM Package Manager Package Backup |
| rrm | Random Ringtone Manager Exported Playlist |
| rtu | RivaTuner Update Package |
| rwa | RealWin Backup File |
| rwd | RWD Archive |
| rwp | RapidWeaver Package |
| rz | Rzip Compressed Data |
| rzip | Remo ZIP Archive |
| s00 | ZipSplitter Splitted Archive |
| s01 | ZipSplitter Splitted Archive |
| s02 | ZipSplitter Splitted Archive |
| s03 | ZipSplitter Splitted Archive |
