| Acronym | Meaning |
| CB | Constant Bandwidth |
| B/W | Black And White |
| VSA | Variable Stability Aircraft |
| IPS | IRL Initiating Reference Letter |
| NMT | Notification Of Master Tool |
| CDMS | Command And Data Management System |
| OFI | Operational Flight Instrumentation |
| ER | Explanation Report |
| FEC | Forward Events Controller |
| VLF | Very Low Frequency |