| Acronym | Meaning |
 | TIS | Test Interface Subsystem |
| CCS | Console Communication System |
| OS | Orbiter CEI Specification |
| FTRD | Flight Test Requirements Document |
| ESA | Engineering SuPPort Assembly |
| FCTB | Flight Crew Training Building |
| POM | Pallet-Only Mode |
| M | PTSMultipurpose Tool Set |
| ECF | Element Charge Factor |
| FBCS | Fixed Base Crew Station (SMS) |
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