| scz | OpenLimit SignCubes Zip Container |
| SmartDraw Collection Package |
| sda | Pretty Good Privacy Self-Decrypting Archive |
| sdc | Stardock Central Download Archive |
| sdn | Shareware Distributors Network |
| sea | StuffIt Expander Archive |
| seg1 | Stuffit Segment Data |
| seg2 | Stuffit Segment Data |
| seg3 | Stuffit Segment Data |
| segn | Stuffit Segment Data |
| sema | Secured EMail Archive |
| sen | Scifer Internal Header Archive |
| sfds | Single File Data Storage |
| sfu | Omnifi DMP1 System Firmware Update |
| sfz | SFzip SoundFont Compressed Archive |
| sgbzip | SaveGameBackup.net Archive |
| sha | Unix Shell Archive |
| shar | Unix Shell Archive |
| shinbo | ShipInBottle Compressed Archive |
| shk | ShrinkIt Archive |
| shr | Unix Shell Archive |
| sidf | NBackup SIDF Backup Archive |
| sis | Psion Series 3 Software Package |
| Symbian Install Package |
| sisx | Symbian Series 3 Install Package |
| sit | StuffIt Expander Archive |
| 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 |
