| Acronym | Meaning |
 | ONBT | Orbiter Neutral Buoyancy Trainer |
| SCA | Schedule Change Authorization |
| SCGSS | Super Critical Gas Storage System |
| EPDS | Electrical Power Distribution Subsystem |
| TSS | TPS Summary Sheet Control |
| HF | Hydrogen Fill |
| RJOD | Reaction Jet OMS Driver |
| MS | Mission SPecialist |
| LDB | Launch Data Bus |
| MCF | Maintenance And Checkout Facility |
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