| Acronym | Meaning |
| SDR | Software Discrepancy Report |
| PCD | Program Change Decision |
| LVDT | Linear Variable Differential Transducer |
| DF | Direction Finder |
| TDR | Time Domaine Reflectometer |
| DP | Development Proposal |
| LF | Low Frequency |
| LRM | Language Reference Manual |
| MMF | Mobile Maintenance Facilities |
| MRF | Maintenance Replacement Factor |