| sc2 | Microsoft Schedule Plus Interchange |
| scd | Microsoft Schedule Plus Document |
| scdoc | SpaceClaim Document |
| sch | KiCad Schematic Document |
| sch | Microsoft Schedule Plus File |
| sch | EAGLE Schematic File |
| schdot | Altium Designer Schematic Template |
| scld | ScoreCleaner Song |
| scn | Caligari TrueSpace Scene |
| scne | Infini-D Scene |
| scriv | Scrivener Document |
| scrivx | Scrivener XML Document |
| scsv | Sealed CSV Document |
| scv | ScanVec CASmate Sign |
| scw | Score Writer Document |
| scw | Movie Magic Screenwriter Document |
| scwx | Score Writer Document |
| sda | StarOffice Draw Template |
| sdb | OpenOffice Base Database |
| sdc | OpenOffice Calc Spreadsheet |
| sdd | StarOffice Presentation |
| sdf | Iconics GraphWorx32 Symbol Library |
| sdfa | Exocad 3D Model |
| sdl | Scene Description Language Document |
| sdl | Web Services Description Language Document |
| sdm | StarOffice Mail Document |
| sdn | Steel Detail Neutral File |
| sdnf | Steel Detail Neutral File |
| sdoc | Sealed Word Document |
| sdocm | Sealed Word 2007 Document without Macros |
| sdocx | Sealed Word 2007 Document |
| sdot | Sealed Word Template |
| sdotm | Sealed Word 2007 Template without Macros |
| sdotx | Sealed Word 2007 Template |
| sdp | StarOffice Packed Presentation |