| Acronym | Meaning |
 | NCGS | Nuclear Criteria Group Secretary |
| SSPC | Spacelab Stored Program Command |
| RTC | Real-time Command |
| SCCH | Standard Cubic Centimeters-per Hour |
| RG | Rate Gyro |
| FMEA | Failure Modes And Effects Analysis |
| FO | Fail Operational |
| CAS | Control Augmentation System |
| PRR | Parts Replacement Request |
| SIT | Software Integrated Test |
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