| Acronym | Meaning |
 | MS | Millisecond |
| T-0 | Time Zero |
| RMRS | Repeatable Maintenance And Recall System |
| HAL/S | High Order Assembly Language/Shuttle |
| SSMECA | SSM E Controller Assembly |
| LS/ST | Light Shield/Star Tracker |
| EM | Engineering Model |
| OF | Operational Instrumentation MDM-FWD |
| UB | UpUtility Bridge |
| CWA | Caution And Warning Annunciator |
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