| Acronym | Meaning |
| FC | Flight Critical |
| ECN | Engineering Change Notice |
| CLMC | Central Logistics Management Center |
| S/P | Signal Processor |
| PDRD | Procurement Data Requirements Document |
| GSTF | Ground Systems Test Flow |
| M&R | Maintenance And Refurbishment |
| PDU | Pressure Distribution Unit |
| LM | Inner Maker |
| RSMM | Redundant System Monitor Model |