| Acronym | Meaning |
| TWTA | Traveling Wave Tube Amplifier |
| HRDS | High Rate Data Station |
| GHE | Gaseous Helium |
| VVI | Vertical Velocity Indicator |
| DCR | Design Concern Report |
| MOR | Manufacturing Operation Record |
| PSID | Pounds Per Square Inch Differential |
| CLG | Ceiling |
| PL | Prelaunch |
| COIM | Checkout Interpreter (Software) Module |