| ssd | Snagit Studio Design Data |
| ssd | Stardock WindowBlinds Skin Filelist |
| ssd | StatView DataSet Transfer |
| ssd01 | SAS Data Set |
| ssdf | Simple Structured Data Format File |
| ssdl | Sonicfire Pro Music |
| sse | StrataSearch Data File |
| ssf | Eventcorder Screenshots Data |
| ssf | Snagit Studio Data |
| ssfn | Steam Guard Data |
| 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 |
| ssml | Speech Synthesis Markup Language Source Code |
| ssn | Railway Operation Simulator Session Data |
| sso_pt | Foxit Reader Data |
| ssr | FLEXIT Singleshot Survey Raw Data |
| sss | Stardock WindowsBlinds Substyles |
| sst | Microsoft Serialized Certificate Store |
| ssu | Microsoft SMS Discovery Hierarchy Manager Site Update |
| ssup | Sonicfire Pro Update |
| ssw | Sony-Ericsson Firmware |
| ssy | ScreenShare Compressed Data |
