| Acronym | Meaning |
| X | X Window System |
| ATIS | Atherton Tool Integration Services (dec) |
| CALC | Calculated |
| LCCB | Local Change Control Board |
| AIPF | Anti-ice Valve Position Failure |
| SQPP | Software Quality Program Plan |
| POCD | Process Operational Concept Document |
| MRAD | Milliradians |
| TF/TA | Terrain Following/terrain Avoidance |
| FPV | Flight Path Vector |