| pwl | Windows 3.x Password List |
| pwz | Microsoft PowerPoint Wizard Add-in |
| pxe | PXE Boot Image |
| pxo | PicoBackup Backup Script |
| pza | PhotoSuite Album File |
| pzc | GraphPad Prism Script |
| qap | Omnis Quartz Application |
| qds | Windows Directory Query File |
| qkx | QuicKeys Action Set |
| qky | Quirky Kernel |
| qpa | QuickTime Player Addition |
| qtc | QuickTime Component File |
| qtn | Symantec Mac OS X Endpoint Protection Quaraintined File |
| qtp | QuickTime Preferences |
| qtr | QuickTime Resources |
| qua | Avira AntiVirus Quarantined File |
| qwq | OpenQwaq Auto-Launch File |
| qwx | Quality Window Script |
| qyc | Quantec Yardstick Plugin |
| rarenx | Egis Encrypted File |
| rbh | RBH UNC500 Firmware |
| rbs | Windows Installer Rollback Script |
| rbz | SketchUp Zipped Ruby Plug-in |
| rcv | Oracle Recovery Manager Script |
| redir | Spotify Executable Redirect |
| reg | Registration Entries |
| regtrans-ms | Windows Registry Transaction Log |
| rej | Patch Reject File |
| ren | Backup Copy File |
| req | Canon Camera Request File |
| rfu | HP Laserjet Printer Remote Firmware Update |
| rfw | Rockchip Firmware |
| rhev | Red Hat Enterprise Virtualization Related Data |
| rhp | Rhino 3D Plugin |
| ri2 | Lowrance Sonar Software Upgrade |