| Acronym | Meaning |
 | U/D | Update |
| RHM | Relative Humidity Monitor |
| OAFTO | Orbiter Atmospheric Flight Test Office |
| FLW | Fellows (TACAN Station) |
| ERS | Engineering Release System |
| OSTDS | Office Of Space Tracking And Data Systems |
| DEW | Distant Early Warning |
| IFT | In-Flight Test |
| QAR | Quality Assurance Responsible/Witness |
| F/A | Failure Analysis |
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