| Acronym | Meaning |
| GA&CS | Ground Acquisition And Command Station |
| RJDA | Reaction Jet Driver Aft |
| D/VD | Data/Voice Data |
| MDE | Mission Dependent Experiment |
| CSR | Check Signal Return |
| FQI | Flight Qualification Instrumentation |
| IAL | International Algebraic Language |
| OSTDS | Office Of Space Tracking And Data Systems |
| NSP | Network Signal Processor |
| LMG | Left Main Gear |