| s3db | SQLite 3 Database |
| s3df | Sealed 3DF Data |
| s3p | Akai Mesa II Program |
| s3p | EEsof EDA S-parameter Data |
| s3p | EEsof Touchstone File |
| s4d | RIAM AVA Motion S4D Data |
| s4mi | Motorola Skin Editor Data |
| s4p | EEsof EDA S-parameter Data |
| s4p | EEsof Touchstone File |
| s4pb | Nokia 108 Phonebook Data |
| s4t | S4/TEXT and Tagless Editor Data |
| s4w | S4/TEXT and Tagless Editor Data |
| s57 | IHO S-57 Vector Interchange Data |
| s5e | VecTor5 Extended Output Data |
| s5l | VecTor5 Load Data |
| s5p | EEsof EDA S-parameter Data |
| s5p | EEsof Touchstone File |
| s5r | VecTor5 Structure Data |
| s6p | EEsof EDA S-parameter 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 |
| s8c | SIMUL8 Script |
| s8theme | Start8 Theme Data |
| s99 | MicroStation Modification Site Resource File |
| sa | ParFlow Simple ASCII Data |
| sa1 | VisualBoyAdvance Saved State |
| sa2 | SAS Access Descriptor |
| sa3 | WinDS PRO Data |
| sa4 | STABCAL Data |
| sa7 | SAS Access Descriptor |
