| Acronym | Meaning |
| SPCU | Simulation Process Control Unit |
| GORS | GrGORSGround Observer RF System |
| CCN | Contract Change Notice |
| VA/T/VTA | Vibro-Acoustic/Thermal/Vacuum Test Article |
| B&P | Budgetary And Planning |
| PDU | Pressure Distribution Unit |
| MELI | Master Equipment List Index |
| W/O | Without |
| OMSP | Operational Maintenance Support Plan |
| BO | Breakout Box |