| Acronym | Meaning |
 | ECU | Electronic Coupling Unit |
| TP | Training Plan |
| PSS | Propulsion Support System |
| OMU | Optical Measuring Unit |
| SPO | Spare Parts Order |
| FAR | Federal Aviation Regulation |
| ETA | Explosive Transfer Assembly |
| SM | ESShuttle Mission Evaluation Simulation (Simulator) |
| STS | Space Transportation System |
| FDR | Final Design Review |
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