| Acronym | Meaning |
 | ILS | InstrumentLanding System |
| FTE | Forced Test End |
| ICOU | Inertial Coupling Data Unit |
| FSL | Flight Systems Laboratory |
| UCS | UnUtilities Control System |
| CRG | Correspondence Review Group |
| PSID | Pounds Per Square Inch Differential |
| CHX | Cabin Heat Exchanger |
| PITG | Payload Integration Task Group |
| FC | Flight Control |
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