| .panic |
Kernel Panic File |
| .printerexport |
Windows Printer Migration File |
| .ps2 |
PCSX2 Memory Card File |
| .pit |
PackIt Compressed Archive |
| .qvm |
Q Virtual Machine |
| .qky |
Quirky Kernel |
| .reg |
Registry File |
| .rmt |
Router Firmware File |
| .rfw |
Rockchip Firmware File |
| .regtrans-ms |
Registry Transaction Log File |
| .rs |
Rust Source Code File |
| .rc2 |
Visual Studio Resources File |
| .rco |
PlayStation Portable Resource File |
| .rc1 |
Samsung Mobile Device Firmware File |
| .ruf |
Samsung DVD and Blu-ray Player Firmware File |
| .rvp |
Sharp Blu-ray Player Firmware File |
| .sys |
Windows System File |
| .swp |
Vi Swap File |
| .scr |
Windows Screensaver |
| .scf |
Windows Explorer Command |
| .sdb |
Custom Application Compatibility Database |
| .sbn |
GT-31 Binary Data File |
| .service |
Systemd Service Unit File |
| .sqm |
Service Quality Monitoring File |