| Abbreviation | Definition |
|---|---|
| SAR | Scalability Availability And Reliability |
| SAR | Scalability, Availability, and Reliability |
| SAR | System Activity Report |
| SAR | System Activity Reporting |
| SARS | Segmentation And Reassembly Sublayer |
| SAS | Secure Attention Sequence |
| SAS | Single Attach Station |
| SASI | Self Aggregating Switched Internet |
| SASP | Server / Application State Protocol |
| SATIN | Secure Australian Telecommunications and Information Network |
| SB | Signal Based |
| SB | Subnegotiation Begin |
| SBBAS | Satellite BroadBand Access System |
| SBC | Smart Bitrate Control |
| SBC | Southwestern Bell Corporation |
| SBD | Short Burst Data |
| SBD | Simultaneous BiDirectional |
| SBN | Smart Business Network |
| SBS | Small Business Server |
| SC | Same Context |