| Acronym | Meaning |
| PER | Preliminary Engineering Report |
| IOP | Input/output Processor |
| LWHS | Light-Weight Headset |
| QSGVT | Quarter Scale Ground Vibration Test |
| SPE | Solid Polymer Electrolysis |
| PC | Pitch Control |
| BCCT | Break Control Command Transducers |
| METVC | Main Engine Thrust Vector |
| OHF | Occupational Health Facility |
| BTR | Bus Transfer |