| Acronym | Meaning |
 | CKRA | Cape Kennedy Reference Atmosphere (Changed To CCR |
| NAS | National Aircraft Standard |
| GCS | Guidance Cutoff Signal |
| DRF | Data RequestForm |
| PSST | Periodic Significant Scheduled Tasks |
| RDF | Resource Data File |
| M+R | Time In Days Before Move Operations |
| MMH | Maintenance Man-Hour |
| RCS | Reaction Control System (Subsystem) |
| PRTLS | Powered Return To Launch Site |
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