| Abbreviation | Definition |
|---|---|
| SPRINT | Southern Pacific Railroad Internal Networking Telephony |
| SPS | Series Parallel Star |
| SPSL | Security Policy Specification Language |
| SQ | Sleep Queue |
| SQ | SQuare |
| SQFP | Quad Small Form-factor Pluggable |
| SQH | Site Quality Head |
| SQI | Signal Quality Indicator |
| SQK | Source Quench Keep |
| SQK | SQuare Keep |
| SQUAD | Software Quality Association in Denver |
| SR | Storage Ring |
| SR | Symbol Rate |
| SR | Synchronizing Resources |
| SRA | Secure Rpc Authentication |
| SRA | Selective Routing Arrangement |
| SRB | Storage Resource Broker |
| SRD | System Resource Document |
| SRIN | Self-Routing Interconnection Network |
| SRM | Scalable Reliable Multicast |