| Abbreviation | Definition |
|---|---|
| SUN | Stanford University Network |
| SUN | System Underconfigured Now |
| SUP | Software Update Protocol |
| SUPL | Secure User Plane Location |
| SUS | Software Update Server |
| SUS | System Update Services |
| SVI | Switch Virtual Interface |
| SW | Spice Works |
| SWAN | Ship-Wide Area Network |
| SWAN | System Wide Automated Network |
| SWAP | Simple Workflow Access Protocol |
| SWAT | Samba Web Administration Tool |
| SWC | SWeatCoin |
| SWIFT | SouthWestern Integrated Fibre Technology |
| SWIP | Shared WhoIs Project |
| SWLAN | Secure Wireless Local Area Network |
| SWN | Seattle Wireless Network |
| SWOOTAC | Semantic Web Owl Ontology Classifier |
| SWP | Stop And Wait Protocol |
| SX | Simplex (one-way) |