| Acronym | Meaning |
 | CR | Certification Requirement |
| RTCP | Real-Time Communications Processor |
| RVDT | Rotary Variable Differential Transformer |
| URN | Urine |
| KOM | KSC Organizational Manual |
| INTLK | Interlock |
| GCILU | Ground Control Interface Logic Unit |
| RTV | Room-temperature Vulcanizing |
| STC | Spacecraft Test Conductor |
| OTT | Optional Team Targeting |
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