| Acronym | Meaning |
| MCM | Memory Controller Moduletmtmine Countermeasures |
| HDG | Heading |
| NTDS | Navy Tactical Data System |
| DISABL | Disable |
| IUSS | Integrated Undersea Surveillance System |
| LORA | Level Of Repair Analysis |
| MSL | Mean Sea Level |
| IOPB | Input/output Parameter Buffer |
| PT | Part |
| NDS | Non-developmental Software |