| Acronym | Meaning |
 | MECF | Main Engine Computational Facilities |
| LCA | Load Controller (Control) Assembly |
| WUC | Work Unit Code |
| MFMR | Multifrequency Microwave Radiometer |
| PALS | Precision Approach And Landing SYstem |
| RCS | Reaction Control System (Subsystem) |
| GACU | Ground Air Conditioning Unit |
| SERVO | Servomechanism |
| SSR | System Requirements Review |
| CTSD | ComPuter Test Sequences Document |
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