| 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 |
| sab | NVision 3D Scanner Data |
| sab | Sevilla Automatic Backup Data |
| sab | Standard ACIS Binary |
| sab2 | NVision 3D Scanner Data |
| sac | IRIS SAC File |
| sac | Scream Recorded SAC Data |
| sad | Windows Server Security Association Database |
| sae | Sage Accountant Link |
| safe | WebMoney Keeper CLASSIC Purse Backup |
| safetext | SafeText Data |
| saff | SuperStream Alternative File Format Data |
| sah | SETI@home Data |
| sai | Burrows-Wheeler Alignment Tool SAI Data |
| saj | Sage 50 Folder Data |
| sal | WRAP Salinity Simulation Results Data |
| sam | PaleoMag ASCII Sample Data |
| sam07 | SAM 2007 Package |
| samp | Apache Drill Sample Data |
| sapssd | SAP GUI Data |
| sar | Sibelius Arrange Style |
| sas7bacs | SAS Access Descriptor |
| sas7baud | SAS Audit Data |
| sas7bbak | SAS Backup |
| sas7bcat | SAS Catalog |
| sas7bdat | SAS Data Set |
| sas7bdmd | SAS Data Mining Database |
| sas7bfdb | SAS Consolidation Database |
| sas7bitm | SAS Item Storage |
