| sit5 | StuffIt 5 Archive |
| sitd | StuffIt Expander Archive |
| sitx | StuffIt Expander Archive |
| sky | SKY Compressed Archive |
| skz | SuperKaramba Compressed Theme |
| sle | Sisulizer Package |
| slp | Stampede Linux Package |
| sma | Silva Media Archive |
| sme | Samsung Kies Messages Backup |
| smea | Samsung Kies Calendar Backup |
| Samsung Kies Messages Backup |
| smem | Samsung Smart Switch Message Data |
| smilebox | Smilebox Starter Archive |
| smsbackup | ASUS Messaging SMS Backup |
| sn3 | Samsung Kies 2 Backup Data |
| snap | Snappy Package |
| snappy | Snappy Compressed Data |
| snz | Snappy SNZ Compressed File |
| sof | ReSOF Compressed Archive |
| sp# | ShadowProtect Incremental Image |
| sp1 | ShadowProtect Spanned Backup |
| sp2 | ShadowProtect Spanned Backup |
| sp3 | ShadowProtect Spanned Backup |
| sp4 | ShadowProtect Spanned Backup |
| sp5 | ShadowProtect Spanned Backup |
| sparc | Skype Plugin Archive |
| spb | Samsung Kies Contacts Backup |
| spba | Samsung Kies Contacts Backup |
| spbm | Samsung Kies Contacts Backup |
| spf | ShadowProtect Full Backup |
| spi | ShadowProtect Incremental Backup |
| spk | SAS Model Package |
| Synology Router Manager Package |
| spkg | SageMath Package |
| spkz | Scribe Template Package |
| spl | Splunk Application Package |
| split | 3DBrowser Splitted File |
| spm | Salt Package Manager Formula Package |
| sqx | SQX Compressed Archive |
| 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 |
| SmartSync Pro Package |
| starpack | Starkit 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 |
| Unix Gzipped TAR Archive |
| thr | THOR Compressed Data |
| tibkp | Titanium Backup Data |
| tibx | Acronis Backup v12 Archive |
| tini | Chrome OS Crostini Backup |
| tkz | TeKton3D Project Archive |
| tmf | TiVo Video Recording Archive |
| to4 | Top 4 Compressed Data |
| toppkg | TopSolid Package |
| tpafz | YouMinds Composer Portable Archive |
| tpf | TexMod Package File |
| tpk | Tizen Application Package |
| tpkg | tpkg-builder data |
| tpxz | Pixz Compressed Tarball |
| ts3_iconpack | TeamSpeak 3 Icon Package |
| tsb | Trabalph Software Program Compressed Data |
| tsep | Tekla Structures Extension Package |
| ttpkg | TomTom Package |
| txz | XZ Compressed Tar Archive |
| tz | Compressed Tape Archive |
| tzb | TAR.Z.btoa Compressed Archive |
| tzip | Tzip Compressed Text |
| tzp | TrueZIP Ecnrypted JAR Archive |
| tzr | ANSYS IcePak Project Package |
| tzst | Zstandard Compressed TAR Archive |
| tzx | Unraid OS Application Package |
| uar | Uniface Deployment Archive |
| uas | PhotoImpact Backup Archive |
| uc2 | UltraCompressor 2 Compressed Archive |
| ucas | Unreal Engine 4 Archive |
| uea | Protector Suite QL Encrypted Archive |
| ueed | Uconomix Encryption Engine Encrypted Directory |
