| Abbreviation | Definition |
|---|---|
| SUNIFF | Sun TAAC Image File Format Bitmap graphics |
| SUP | StartUP screen Bitmap graphics |
| SUP | SUPplementary dictionary |
| SVD | SaVeD Document autosave file |
| SVF | Simple Vector Format Vector graphics |
| SVF | SmartVersion Files |
| SVF | Temporary file |
| SVG | Microsoft Word Glossary Autosave file |
| SVP | Scheme language source code file |
| SVQ | Music file |
| SVR | Virtual world |
| SVS | Style sheet autoSaVe file |
| SVX | Sound (Amiga 8SVX format) |
| SW | Signed Word Audio file |
| SWA | Macromedia Shockwave Music MPEG-1 Layer III with special header |
| SWC | Shock Wave Component |
| SWF | Macromedia Flash file |
| SWF | ShockWave Flash |
| SWG | SWAG Pascal Snippets file (SWAG Reader) |
| SWP | Sprint Document backup |