| .SBL | Adobe Systems Incorporated | Graafiset Tiedostot | Shockwave Flash Object | Apache OpenOffice | Apache Software Foundation |
| .SCRIPT | Unknown Developer | Suoritettavat tiedostot | Generic Script File | OpenOffice Writer | Apache Software Foundation |
| .SDA | Oracle Corporation | Vektorikuvatiedostot | StarOffice Drawing | Apache OpenOffice | Apache Software Foundation |
| .SDC | Stardock Corporation | Varmuuskopiointitiedostot | Stardock Central Download Archive | Apache OpenOffice | Apache Software Foundation |
| .SDD | Programming Sunrise | Datatiedostot | Smart Diary Suite Data File | Apache OpenOffice | Apache Software Foundation |
| .SDI | Intuit, Inc. | Datatiedostot | QuickBooks Data File | Apache OpenOffice | Apache Software Foundation |
| .SDP | Oracle Corporation | Datatiedostot | StarOffice Presentation File | Apache OpenOffice | Apache Software Foundation |
| .SDS | Oracle Corporation | Datatiedostot | OpenOffice.org Chart | Apache OpenOffice | Apache Software Foundation |
| .SDV | Pinnacle Systems Inc. | Videotiedostot | Studio DV Project File | Apache OpenOffice | Apache Software Foundation |
| .SDW | LizardTech | GIS-tiedostot | MrSID World File | Apache OpenOffice | Apache Software Foundation |
| .SFS | Open Source | Pakatut tiedostot | Squashfs File Archive | Apache OpenOffice | Apache Software Foundation |
| .SILK | Microsoft Corporation | Työkirjatiedostot | Microsoft Excel Symbolic Link Format | Apache OpenOffice Calc | Apache Software Foundation |
| .SKI | Motorola | Asetustiedostot | Motorola Phone Skin File | Apache OpenOffice | Apache Software Foundation |
| .SKV | Microsoft Corporation | Datatiedostot | Semicolon Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .SMF | Oracle Corporation | Tekstitiedostot | StarMath Formula File | Apache OpenOffice | Apache Software Foundation |
| .SMS | Sega | Pelitiedostot | Sega Master System ROM | Apache OpenOffice | Apache Software Foundation |
| .SOB | Apache Software Foundation | Rasterikuvatiedostot | OpenOffice.org Impress Bimap Styles File | Apache OpenOffice | Apache Software Foundation |
| .SOC | Apache Software Foundation | Asetustiedostot | OpenOffice.org Configuration File | Apache OpenOffice | Apache Software Foundation |
| .SOD | id Software | Pelitiedostot | Spear Of Destiny Data File | Apache OpenOffice | Apache Software Foundation |
| .SOF | Apache Software Foundation | Datatiedostot | Colour Palettes And Various Style Elements File | Apache OpenOffice | Apache Software Foundation |
| .SOG | Apache Software Foundation | Datatiedostot | Apache OpenOffice (OpenOffice.org) Colour Palettes | Apache OpenOffice | Apache Software Foundation |
| .SRS | Microsoft Corporation | Asetustiedostot | Outlook Send/Receive Settings File | Apache OpenOffice | Apache Software Foundation |
| .STC | Adobe Systems Incorporated | Web-tiedostot | Contribute Connection Key File | Apache OpenOffice | Apache Software Foundation |
| .STD | Oracle Corporation | Vektorikuvatiedostot | Apache OpenOffice Drawing Template | Apache OpenOffice | Apache Software Foundation |
| .STE | Adobe Systems Incorporated | Asetustiedostot | Dreamweaver Site Settings File | OpenOffice Writer | Apache Software Foundation |
| .STI | Oracle Corporation | Datatiedostot | StarOffice Presentation Template | Apache OpenOffice | Apache Software Foundation |
| .STM | Microsoft Corporation | Datatiedostot | Exchange Streaming Media File | Apache OpenOffice Calc | Apache Software Foundation |
| .STW | Oracle Corporation | Tekstitiedostot | StarOffice Document Template | Apache OpenOffice | Apache Software Foundation |
| .SVM | Star Division | Rasterikuvatiedostot | StarView Metafile | Apache OpenOffice | Apache Software Foundation |
| .SVN | Apache Software Foundation | Datatiedostot | Subversion Data File | Subversion | Apache Software Foundation |
| .SWX | Apache Software Foundation | Tekstitiedostot | OpenOffice.org 1.0 Text Document | Apache OpenOffice | Apache Software Foundation |
| .SXC | Sun Microsystems | Työkirjatiedostot | StarOffice Calc Spreadsheet | Apache OpenOffice Calc | Apache Software Foundation |
| .SXD | ESRI | GIS-tiedostot | ArcScene Document | Apache OpenOffice | Apache Software Foundation |
| .SXG | Oracle Corporation | Tekstitiedostot | Apache OpenOffice Master Document | Apache OpenOffice | Apache Software Foundation |
| .SXI | Oracle Corporation | Datatiedostot | StarOffice Impress Presentation | Apache OpenOffice | Apache Software Foundation |
| .SXW | Oracle Corporation | Tekstitiedostot | StarOffice Writer Document | Apache OpenOffice | Apache Software Foundation |
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