| Acronym | Meaning |
| PCA | Pneumatic Control Assembly |
| VATA | Vibro-Acoustic Test Article |
| MIOS | Multi-IMU Operation System |
| VGY | Velocity To Be Gained (Body Y-Axis) |
| PNP | Prenegotiation Position |
| PRS | Payload Retention Subsystem |
| FRRID | Flight Readiness Review Item DisPosition |
| HPOT | High-pressure Oxidizer Turbopump |
| POV | Peak Operating Voltage |
| MAC | Mean Aerodynamic Chord |