| Abbreviation | Definition |
|---|---|
| SAS | Shadow Address Space |
| SBC | SCSI (Small Computer System Interface) Block Command |
| SBP | Serial Bus Protocol |
| SCULL | Simple Character Utility for Loading Localities |
| SDCD | Supra Drivers Club Denmark |
| SDDL | Security Descriptor Definition Language |
| SDO | Serial Data Out |
| SDP | Sockets Direct Protocol |
| SDTV | Standard-Definition TeleVision |
| SDV | Static Driver Verifier |
| SECAM | SEquentiel Couleur Avec Mémoire |
| SID | Security IDentifier |
| SIMM | Single Inline Memory Module |
| SIOM | Server Input/Output Module |
| SIR | Serial Infra-Red |
| SLAT | Second-Level Address Translation |
| SMART | Self-Monitoring, Analysis, and Reporting Technology |
| SMBIOS | System Management Basic Input/Output System |
| SMP | Symmetric Multi-Processing |
| SOC | System On a Chip |