| sl1 | Articulate Storyline Document |
| sla | Scribus Document |
| slb | Autodesk AutoCAD Slide Library |
| sld | Autodesk AutoCAD Slide Library |
| sldbndtbt | SolidWorks Bend Table Template |
| sldbomtbt | SolidWorks Bill of Materials Template |
| slddot | SolidWorks Sheet Template |
| slddraw | SolidWorks Drawing Document |
| slddrt | SolidWorks Sheet Document |
| slddrw | SolidWorks Drawing Document |
| slddwg | SolidWorks 2D Vector Drawing |
| sldfvt | SolidWorks Favorite |
| sldm | Microsoft PowerPoint 2007 Slide |
| sldtbt | SolidWorks General Table Template |
| sldx | Microsoft PowerPoint 2007 Slide |
| sldxml | SolidWorks 3DEXPERIENCE XML Document |
| slvs | SolveSpace Document |
| sly | GNU Lilypond Document |
| smdf | Surface Magic Design |
| smf | OpenOffice Math Formula |
| smht | Sealed MHT Document |
| smlx | Steel Markup Language Document |
| smm | Ami Pro Macro |
| smpl | Megahedron 3D Object |
| smst | Adobe Soundbooth Score Toolkit Document |
| smu | Simple MUsical Score Document |
| smus | Simple MUsical Score Document |
| smz | SMath Studio Compressed Document |
| snapdoc | Ashampoo Snap Document |
| snp | Microsoft Access Report SnapShot |
| snt | VX Show-n-Tell Slideshow |
| soap | Simple Object Access Protocol Message |
| spar | Spartan Document |
| spartan | Spartan Document |
| spdf | Sealed PDF Document |