| Acronym | Meaning |
 | JTG | Joint Training Group |
 | TMG | Thermal Meteoroid Garment |
 | TG | Ground Systems (KSC Directorate) |
 | HX | Heat Exchanger |
 | PTC | Portable Temperature Controller |
 | GBI | Grand Bahama Island |
 | SMG | SPaceflight Meteorology Group |
 | SHS | Simulation Hardware System |
 | MDT | Measurement Descriptor Table |
 | NOC | Notation Of Content |