| s2gx | Spike2 v7 Grid View Data |
| s2l | Spike2 Library |
| s2p | EEsof Touchstone File |
| s2r | Spike2 Resource Data |
| s2rx | Spike2 v7 Resource Data |
| s2s | Spike2 Script |
| s2t | Scia Engineer to Tekla Converter Data |
| s2wdh | HP Share to Web Upload Folder Data |
| s3 | Motorola S-record Data |
| s31 | SmartWhois Data |
| s32 | Motorola S-record Data |
| s37 | Motorola S-record Data |
| s3c | ContextCapture 3D Model Data |
| s3d | Shout3D 3D Scene |
| s3d | Simple 3D Object |
| s3db | SQLite 3 Database |
| s3p | Akai Mesa II Program |
| s3p | EEsof Touchstone File |
| s4d | RIAM AVA Motion S4D Data |
| s4mi | Motorola Skin Editor Data |
| s4p | EEsof Touchstone File |
| s4pb | Nokia 108 Phonebook Data |
| s57 | IHO S-57 Vector Interchange Data |
| s5e | VecTor5 Extended Output Data |
| s5l | VecTor5 Load Data |
| s5p | EEsof Touchstone File |
| s5r | VecTor5 Structure Data |
| s6p | EEsof Touchstone File |
| s7 | Sibelius Scale Diagram Library |
| s7d | Sony Ericsson S700i Phone Default Language |
| s7m | SAS Data Mining Database |
| s7s | Sony Ericsson S700i Phone Firmware |
| s8 | SIMUL8 Simulation |
| s85 | Sabre Airline Solutions Chart |
| s8theme | Start8 Theme Data |
