| Acronym | Meaning |
| HE | Helium |
| GNCFTS | GNGNCFTSGN&C Flight Test Station |
| VOIR | Venus Orbiter Imaging Radar |
| IDE | Initial Design Evaluation |
| PRIM | Primary |
| FTA | Fatigue Test Article |
| HLDS | Hydrogen Leak Detection System |
| FLTR | Filter |
| VOX | Voice Operated Transmitter (Transmission) |
| ETM | ElaPsed Time Meter |