| Acronym | Meaning |
 | C&T | Communications And Tracking |
| PPS | Pulse Per Second |
| POI | Propellant Quantity Indicator |
| RRL | Rudder Reference Line |
| MPM | Manipulator Positioning Mechanism |
| SFEX | Solar Flare X-ray Polarimeter |
| MPTA | Main Propulsion Test Article |
| MOL | Molecular |
| EMG | Electromyograph(gram) |
| USS | Utility Support Structure |
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