| Acronym | Meaning |
| TTCA | Thrust Translation Controller Assembly |
| SSPTF | Santa Susana Propulsion Test Facility (see SSFL) |
| HPR | Hydrogen Pressure Regulator |
| EOI | Earth Orbit Insertion |
| SCA | Schedule Change Authorization |
| SBTC | Speed Brake/thrust Controller |
| MMU | Manned Maneuvering Unit |
| SEM | Scanning Electron Microscope |
| BR | Bit Rate |
| FDB | Fahrenheit Dry Bulb |