| sfs | Sibelius Configuration File |
| sgc | Secure SnapGear Router Configuration |
| shed | Shed Configuration |
| shi | Simple Help Editor Settings |
| shortcut | Asutype Shortcut Data |
| sif | Windows NT Setup Information File |
| siz | Oracle 7 Configuration Data |
| skt | Lightwave 3D Skytracer Settings |
| sldreg | SolidWorks Saved Settings |
| slip | Embarcadero License Configuration |
| sll | SpectraLayers Pro Layout Settings |
| slt | K-Meleon Browser Settings Data |
| smartftp | SmartFTP Configuration Data |
| smn | SetEdit Menu Configuration |
| smprf | System Mechanic Windows Startup Profile |
| smr | Smedge2 Job Settings |
| snagprof | SnagIt Profile Data |
| sno | Starry Night Pro Presets |
| sob | OpenOffice.org Configuration File |
| soc | OpenOffice.org Configuration File |
| sod | OpenOffice.org Configuration File |
| soe | OpenOffice.org Configuration File |
| sog | OpenOffice.org Configuration File |
| soh | OpenOffice.org Configuration File |
| spc | X-12-Arima Input Specification |
| spds | SAS Scalable Performance Data Server Configuration |
| spf | Site Publisher Profile |
| spfx | Squeeze Presets |
| spm | Spektrum DX8 Transmitter Settings File |
| srp | Check Point Exported VPN Profile |
