| Acronym | Meaning |
 | CONT | Contingency |
| POST | Positive |
| IPS | I RTCMIntegrated Real-Time Contamination Monitor |
| SIO | Serial Input/output |
| DB | Data Base |
| ESTA | Electronic System Test Equipment |
| OMU | Optical Measuring Unit |
| ACRV | Assured Crew Return Vehicle |
| FILE | Future Identification And Location Experiment |
| OFDS | Oxygen Fluid Distribution System |
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