| Acronym | Meaning |
 | VAC | Vehicle Assembly And Checkout |
| ETA | Explosive Transfer Assembly |
| EST | Estimate(d) |
| PUCS | Propellant Utilization Control System |
| FAO | Flight Activities Officer |
| PCTO | Payload Cost Tradeoff Optimization |
| TPS | Thermal Protection System (SR[3 |
| PIPA | Pulse Integrating Pendulum Accelerometers |
| MPS | Main Propulsion System (Subsystem) |
| RFO | Request For Order |
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