| Abbreviation | Definition |
|---|---|
| SOP | Standard Operating Platform |
| SOPC | System On Programmable Chip |
| SOS | Start-up Override Switch |
| SOSI | System Of Systems Interoperability |
| SOT | Screen On Time |
| SP | Single Processor |
| SP | Spare Parts |
| SP | Special Performance |
| SPADE | SPatialization and Auditory Display Environment |
| SPAM | Special Peripherally Assisted Microprocessor |
| SPAN | Super Passive Analyzer Node |
| SPARC | Scalable Processor ARChitecture |
| SPARK | Small Parts Addition to Robotics Kit |
| SPAWAR | Space and Naval Warfare Systems Command |
| SPC | Small Pic Computer |
| SPD | Surge Protection Device |
| SPDIF | Sony Phillips Digital Interface Format |
| SPDT | Signal Pole Double Throw |
| SPE | Serial Parallel Expansion |
| SPE | Surface Preparation Equipment |