| Acronym | Meaning |
![](file.png) | VSA | Variable Stability Aircraft |
![](file.png) | USA | United States Of America |
![](file.png) | OPF | Orbiter Processing Facility |
![](file.png) | HEMI | Hemispherical (S-Band Antenna) |
![](file.png) | GACU | Ground Avionics Cooling Unit |
![](file.png) | VAR | Volt Ampere Reactive |
![](file.png) | HYD | HYdraulics |
![](file.png) | ICDU | Inertial CouPling Data Unit |
![](file.png) | FCEI | Facility Contractor End Item |
![](file.png) | HSK | Horizontal Sling Kit |