| ssi | SAP Business Objects Shared Security Information File |
| ssii | ProReveal Test Data File |
| ssj | STAR Splice Junction Data |
| ssleay | SSLeay Data |
| sslf | HLSW Shared Server List |
| ssm | BrainVoyager QX SSM Data |
| ssr | FLEXIT Singleshot Survey Raw Data |
| sss | Stardock WindowsBlinds Substyles |
| sst | Microsoft Serialized Certificate Store |
| ssw | Sony-Ericsson Firmware |
| ssy | ScreenShare Compressed Data |
| ssz | Spider Player Skin |
| st0 | SPICE Status Data |
| st0 | HSPICE Simulation Summary Data |
| st2 | SAS Audit Data |
| st7 | SAS Audit Data |
| sta | STATISTICA Spreadsheet File |
| sta | Adobe Photoshop CS Color Statistics |
| stan | Stan Model File |
| startupinfo | E-Prime StartupInfo File |
| stat | EnergyPlus Weather Data Summary Report |
| state | Windows Photo Gallery State File |
| stats | FreeSurfer Statistics File |
| stbom | Catia SmartBOM Data |
| stc | BrainVoyager QX Slice Time Course Data |
| stdid | RSA Soft Token Seed |
| stdl | Swift To-Do List Database |
| steamstart | Valve Steam Start |
| stencyl | Stencyl Game Data |
| step | Tekla STEP Data |
