| srep | SuperREP Compressed |
| srr | ReScene Data |
| ssa | Visual SourceSafe Backup Archive |
| ssb | Simply Safe Backup Archive |
| ssc | Samsung Kies Calendar Backup |
| ssp | FotoMagico Slideshow Package |
| ssp | SmartSync Pro Package |
| stix | StuffIt Expander Archive |
| sue | SUE ARC Archive |
| sv4cpio | System V Release 4 CPIO Archive |
| sv4crc | System V Release 4 CPIO Checksum Data |
| swu | SWUpdate Archive |
| swup | AC70 Software Update Package |
| szp | SecureZIP Archive |
| szs | Nintendo Switch Game Archive |
| t4 | Top 4 Compressed Data |
| t7z | Littleutils To-7Zip Recompressed Archive |
| tar | Tape Archive |
| taraa | Tape Archive Split Archive |
| tardist | IRIX TAR Distribution Archive |
| targz | Unix Gzipped TAR Archive |
| taz | Unix Gzipped TAR Archive |
| tbk | The Bat! Backup Archive |
| tbz | Bzip Compressed Tape Archive |
| tbz2 | Bzip2 Compressed Tape Archive |
| tce | Tiny Core Linux Extension |
| tck | BMISuite BMIScan Compressed Archive |
| tgz | Drobo Application Package |
| tgz | Unix Gzipped TAR Archive |
| thr | THOR Compressed Data |
