| Acronym | Meaning |
 | PBI | Push Button Indicator |
| RECS | Representative Shuttle Environmental Control System |
| DDA | ICD Departure Authorization |
| MSG | Mission SupportGroup |
| SIA | Shuttle Induced Atmosphere |
| WSGT | White Sands Ground Terminal |
| NRCC | National Research Council Of Canada |
| NRTS | Not Repairable At This Station |
| LPTTL | Low Power Transistor-Transistor Logic |
| SIU | Signal Interface Unit |
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