| r09 | WinRAR Archive |
| r1 | WinRAR Multi-Volume Archive Part 1 |
| r10 | WinRAR Archive |
| r11 | WinRAR Archive |
| r17 | WinRAR Archive |
| r2 | WinRAR Multi-Volume Archive Part 2 |
| r21 | WinRAR Split Archive Part 21 |
| r30 | WinRAR Archive |
| r99 | WinRAR Archive |
| rae | TrueZIP Encrypted Archive |
| raes | TrueZIP Encrypted Archive |
| rar | WinRAR Archive |
| rbf | Stellar Insta Backup Image |
| rdar | Reflection Desktop Customization Archive |
| rem | BlackBerry Encrypted File |
| restore | Xilinx ISE Webpack Project Restore Data |
| rev | WinRAR Recovery Volume |
| rge | Microsoft Entourage Archive |
| rhi | Rhino3D Installer Package |
| rk | RK Compressed Archive |
| rkv | Rkive Compressed Archive |
| rnc | RNC ProPack 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 |
