| ssg | Investor's Toolkit Data |
| ssi | SAP Business Objects Shared Security Information File |
| ssii | ProReveal Test Data File |
| ssj | STAR Splice Junction Data |
| sskd | On Schedule Schedule Data |
| ssl | CorelFlow Smart Library |
| ssleay | SSLeay Data |
| sslf | HLSW Shared Server List |
| ssm | AQUA Disulphide Distance Restraints Summary Data |
| ssm | BrainVoyager QX SSM Data |
| ssm | MODELLER Secondary Structure Assignment Data |
| ssml | Speech Synthesis Markup Language Source Code |
| ssn | Railway Operation Simulator Session Data |
| ssn | Shutdown Scheduler Shared Notes Data |
| sso_pt | Foxit Reader Data |
| ssp | SAS Transport Data |
| ssr | FLEXIT Singleshot Survey Raw Data |
| sss | Stardock WindowsBlinds Substyles |
| sst | ECMWF IFS Sea Surface Temperature Data |
| sst | Microsoft Serialized Certificate Store |
| sst | Yamaha Tyros 2 Session Style |
| ssu | Microsoft SMS Discovery Hierarchy Manager Site Update |
| ssup | Sonicfire Pro Update |
| ssw | Sony-Ericsson Firmware |
| ssx | ScreenShare Data |
| ssy | ScreenShare Compressed Data |
| ssz | Spider Player Skin |
| st | StreamTorrent Data |
| st0 | HSPICE Simulation Summary Data |
| st0 | SPICE Status Data |
| st1 | SPICE Status Data |
| st2 | SAS Audit Data |
| st2 | SPICE Status Data |
| st3 | SPICE Status Data |
| st3i | SampleTank 3 Instruments Data |
