| .SBL | Adobe Systems Incorporated | Grafikdateien | Shockwave Flash Object | Apache OpenOffice | Apache Software Foundation |
| .SDA | Oracle Corporation | Vektorbilddateien | StarOffice Drawing | Apache OpenOffice | Apache Software Foundation |
| .SDC | Stardock Corporation | Backupdateien | Stardock Central Download Archive | Apache OpenOffice | Apache Software Foundation |
| .SDD | Programming Sunrise | Textdateien | Smart Diary Suite Data File | Apache OpenOffice | Apache Software Foundation |
| .SDI | Intuit, Inc. | Textdateien | QuickBooks Data File | Apache OpenOffice | Apache Software Foundation |
| .SDP | Oracle Corporation | Textdateien | StarOffice Presentation File | Apache OpenOffice | Apache Software Foundation |
| .SDS | Oracle Corporation | Textdateien | OpenOffice.org Chart | Apache OpenOffice | Apache Software Foundation |
| .SDV | Pinnacle Systems Inc. | Videodateien | Studio DV Project File | Apache OpenOffice | Apache Software Foundation |
| .SDW | LizardTech | GIS-Dateien | MrSID World File | Apache OpenOffice | Apache Software Foundation |
| .SFS | Open Source | Komprimierte Dateien | Squashfs File Archive | Apache OpenOffice | Apache Software Foundation |
| .SKI | Motorola | Einstellungsdateien | Motorola Phone Skin File | Apache OpenOffice | Apache Software Foundation |
| .SKV | Microsoft Corporation | Textdateien | Semicolon Separated Values File | Apache OpenOffice | Apache Software Foundation |
| .SMF | Oracle Corporation | Textdateien | StarMath Formula File | Apache OpenOffice | Apache Software Foundation |
| .SMS | Sega | Spieldateien | Sega Master System ROM | Apache OpenOffice | Apache Software Foundation |
| .SOB | Apache Software Foundation | Rasterbilddateien | OpenOffice.org Impress Bimap Styles File | Apache OpenOffice | Apache Software Foundation |
| .SOC | Apache Software Foundation | Einstellungsdateien | OpenOffice.org Configuration File | Apache OpenOffice | Apache Software Foundation |
| .SOD | id Software | Spieldateien | Spear Of Destiny Data File | Apache OpenOffice | Apache Software Foundation |
| .SOF | Apache Software Foundation | Textdateien | Colour Palettes And Various Style Elements File | Apache OpenOffice | Apache Software Foundation |
| .SOG | Apache Software Foundation | Textdateien | Apache OpenOffice (OpenOffice.org) Colour Palettes | Apache OpenOffice | Apache Software Foundation |
| .SRS | Microsoft Corporation | Einstellungsdateien | Outlook Send/Receive Settings File | Apache OpenOffice | Apache Software Foundation |
| .STC | Adobe Systems Incorporated | Webdateien | Contribute Connection Key File | Apache OpenOffice | Apache Software Foundation |
| .STD | Oracle Corporation | Vektorbilddateien | Apache OpenOffice Drawing Template | Apache OpenOffice | Apache Software Foundation |
| .STI | Oracle Corporation | Textdateien | StarOffice Presentation Template | Apache OpenOffice | Apache Software Foundation |
| .STW | Oracle Corporation | Textdateien | StarOffice Document Template | Apache OpenOffice | Apache Software Foundation |
| .SVM | Star Division | Rasterbilddateien | StarView Metafile | Apache OpenOffice | Apache Software Foundation |
| .SWX | Apache Software Foundation | Textdateien | OpenOffice.org 1.0 Text Document | Apache OpenOffice | Apache Software Foundation |
| .SXD | ESRI | GIS-Dateien | ArcScene Document | Apache OpenOffice | Apache Software Foundation |
| .SXG | Oracle Corporation | Textdateien | Apache OpenOffice Master Document | Apache OpenOffice | Apache Software Foundation |
| .SXI | Oracle Corporation | Textdateien | StarOffice Impress Presentation | Apache OpenOffice | Apache Software Foundation |
| .SXW | Oracle Corporation | Textdateien | StarOffice Writer Document | Apache OpenOffice | Apache Software Foundation |
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