| Abbreviation | Definition |
|---|---|
| S/C | Stabilization and Control |
| S/C | StripChart |
| S/C | Stripchart (Recorder) |
| S/C | Subcontractor |
| S/C | Sub-Contractor |
| S/EOS | Standard Earth Observation Satellite |
| S/F | Safety Factor |
| S/F | Single Flow |
| S/G | Strain Gage |
| S/L | Shop/Laboratory |
| S/M | Scheduled Maintenance |
| S/M | Service/Maintenance |
| S/M | Structural/Mechanical |
| S/M | Systems management |
| S/O | Shutoff |
| S/O | Switchover |
| S/P | Serial to Parallel |
| S/P | Signal Processor |
| S/R | Send and Receive |
| S/R | Shift Register |