| 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 |
| repo | Yum Package Repository Configuration |
| resmoncfg | Resource Monitor Configuration |
| rfi | BlackBerry Email Filter |
| rfw | Reflection FTP Settings |
| rhs | Iconyx BeamWare Setup Parameters Data |
| rin | RappInfo PostScript Converter Configuration |
| rkr | Rakarrack Presets Data |
| root | Bind Root Nameservers Configuration |
| rps | Autodesk 3D Studio MAX Render Preset Settings |
| rsx | RSLinx Configuration Data |
| rub | JQuery Rules Data |
| rvs | Lattice Reveal Analyzer Settings |
| sbs | Substance Designer Substance Package |
| sbsprs | Substance Designer Presets Data |
| scacfg | SuperCard Application Configuration |
| scheme | Sothink Logo Maker Color Scheme |
| scpcfg | SuperCard Project Configuration |
| sde | ArcSDE Connection File |
| sdg | OpenOffice.org Configuration File |
| sdv | OpenOffice.org Configuration File |
| set | SmartCAM Connection Settings File |
| set | General Settings File |
| settings | Configuration File |
| sfs | Sibelius Configuration File |
| sgc | Secure SnapGear Router Configuration |
| shi | Simple Help Editor Settings |
| shortcut | Asutype Shortcut Data |
| sif | Windows NT Setup Information File |
| skt | Lightwave 3D Skytracer Settings |
| sldreg | SolidWorks Saved Settings |
