| q5q | SuperBladePro Presets Data |
| q9q | SuperBladePro Presets Data |
| q9s | Mr Contrast Preset Data |
| qdr | Q-Dir Configuration |
| qemu | QEMU Configuration Data |
| qm4 | Qmail Options Data |
| qnc | Cliq Accessories Notepad Customization |
| qop | Autodesk 3D Studio MAX Quad Options |
| qsf | Altera Quartus II Settings File |
| qtes | QuickTime Export Settings |
| qvpn | QVPN Configuration |
| qwc | QuickBooks Web Connector Configuration |
| qyp | Quantec Yardstick Presets |
| r1w | Reflection UNIX and OpenVMS Settings |
| r2w | Reflection UNIX and OpenVMS Settings |
| r4w | Reflection UNIX and OpenVMS Settings |
| rak | CEM+ Rack Configuration Data |
| raskinplace | Raskin Place Layout |
| rb4 | RobotWorks Parameters File |
| rc | Runtime Configuration File |
| rcds | STAAD Advanced Concrete Design Project Settings Data |
| rcf | SonicWALL VPN Configuration |
| rcm | Hyena Remote Control Configuration File |
| rcolor | Rhino 3D Color Options |
| rdp | Remote Desktop Connection Settings |
| reap | WebReaper Profile |
| repatch | DCAM EnvShaper Effect Preset |
| repo | Yum Package Repository Configuration |
| resmoncfg | Resource Monitor Configuration |
| rfi | BlackBerry Email Filter |
