| Abbreviation | Definition |
|---|---|
| SFQ | Stochastic Fair Queuing |
| SFT | Server Fault Tolerance |
| SFT | Symmetric Fault Tolerance |
| SFT | System File Table |
| SGBP | Stack Group Bidding Protocol |
| SGM | Second Generation Multiplex |
| SGNIC | Singapore Network Information Centre |
| SH | Service Host |
| SHARP | Self Healing And Redundant Paths |
| SHDS | Short Haul Data Service |
| SHDSL | Symmetric High-Speed Digital Subscriber Line |
| SHINE | Senior Health Information Networking And Education |
| SHIP | Simple Host Information Protocol |
| SHOO | Soft HandOver Overhead |
| SI | Selectable Interface |
| SI | Slow Import |
| SI | Solutions Infini |
| SID | Shared Information Distance |
| SIEM | Security Information and Event Management |
| SIF | School Interoperability Framework |