| Acronym | Meaning |
 | CPES | Crew Procedures Evaluation (Evaluator) Simulator |
| RHCM | Relative Humidity Control/Monitor |
| OW | Optical Window |
| ORD | Operational Requirements Document |
| EOP | Earth And Ocean Physics |
| PCTO | Payload Cost Tradeoff Optimization |
| SSPP | SYstem Safety Program Plan |
| MOR | Manufacturing Operation Record |
| DOH | Discrete Output High |
| HTEXCH | Heat Exchanger |
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