| Acronym | Meaning |
| PRSD | Power Reactant Supply And Distribution |
| GCC | Ground Communications Coordinator |
| GCU | Gyro Coupling Unit |
| O&P | Operations And Procedures |
| DARS | Data Acquisition And Reduction System |
| SSA | S-Band Single Access |
| GSCU | Ground Service Cooling Unit |
| GNC | GuGNCGuidance And Navigation COmPuter |
| IGM | Interactive Guidance Mode |
| SDRD | SuPplier Documentation Review Data |