| Acronym | Meaning |
| SCST | Submarine Combat System Trainers (21a Series) |
| SSWG | System Safety Working Group |
| ILS | Integrated Logistics Support |
| RPM | Revolutions Per Minute |
| SLCMP | Software Life Cycle Management Plan |
| ACT | Actuator |
| XFMR | Transformer |
| NMDAS | Navy Manpower Data Accounting System |
| EMC | Electromagnetic Compatibility |
| PMDB | Project Master Data Base (trw Ir&d Project Name) |