| Meaning | Category |
| SCeNe RTrace | Computing->File Extensions |
| Saarbrucken, Germany | Regional->Airport Codes |
| Sales Contract Number | Business->General |
| Saskatchewan Communications Network | Community->Educational |
| Screen Dump or File | Computing->File Extensions |
| Seanet Communications Node | Academic & Science->Ocean Science |
| Send Configure Nak | Computing->Networking |
| Ship Conversion, Navy | Governmental->Military |
| Specification Change Notice | Governmental->Military Governmental->NASA |
| Studii şI ComunicăRi De Numismatică, BucureşTi | International->Romanian |
| Super Channel Network | Business->Firms |
| Supra-Chiasmatic Nucleus | Academic & Science->Botany |
| Switched Circuit Network | Computing->Telecom |
| Symposium on Simulation of Computer Networks | Academic & Science->IEEE |
| System Change Number | Governmental->Military |
| System Commit Number | Computing->Networking |
| System Control Network | Governmental->Military |
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