| sgo | Silicon Graphics Object File |
| sh3 | Harvard Graphics 3.0 Show Presentation |
| sh3d | Sweet Home 3D Design |
| shg | Segmented Hypergraphic Document |
| show | Hanshow Presentation Document |
| sht | HTML Document with SSI |
| shtm | HTML Document with SSI |
| shtml | HTML Document with SSI |
| shv | Husqvarna Viking SHV Embroidery |
| shw | Corel Presentations Document |
| sia | Silo 3D Model |
| siag | Siag Spreadsheet Document |
| sib | Sibelius Music Notation |
| sig | GPG/PGP Signature |
| sig | Broderbund PrintMaster Poster |
| sil | Silhouette Designer Document |
| sjis | Shift JIS Encoded File |
| sk | Slovak Language Info File |
| sk2 | ACD/ChemSketch Drawing Document |
| skchr | SketchChair Design |
| skd | Autodesk AutoSketch Drawing |
| skg | Skrooge Document |
| skin | Help and Manual Viewer Template |
| skl | XLIFF Skeleton File |
| skv | Semicolon Separated Values |
| skw | SideKick Write Document |
| sla | Scribus Document |
| slb | Autodesk AutoCAD Slide Library |
| sld | Autodesk AutoCAD Slide Library |
| sldbndtbt | SolidWorks Bend Table Template |
