| Acronym | Meaning |
 | PSE | Peculiar Support Equipment |
| SDL | Software Development Library |
| PVS | Periscope View Simulators (associated With 21a Series) |
| OBT | On Board Training |
| ADP | Automatic Data Processing |
| REC | Record |
| CWBS | Contract Work Breakdown Structure |
| CPT | Control Position Transducer |
| TAEAS | Tactical Asw Environmental Acoustic Support |
| TAT | Turnaround Time |
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