| Acronym | Meaning |
 | CHG | Change |
| BARS | Baseline Accounting And Reporting System |
| T | Superscript) |
| SP | Shuttle Projects Office (KSC) |
| EDS | Emergency Detection System |
| GPU | Ground Power Unit |
| MSLD | Mass Spectrometer Leak Detector |
| D/L | Downlist |
| TCSSS | Thermal Control Subsystem Segment |
| SHE | SuPercritical Helium |
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