| Acronym | Meaning |
| EPD | Electrical Power Distribution |
| EEIS | End-to-End Information System |
| SDRD | SuPplier Data Requirements Description |
| DCR | Document Change Record (or Review) |
| NGT | NASA Ground Terminal |
| RHL | Residual Hazards List |
| MTBD | Mean Time Between Demand |
| TAL | Transatlantic Abort Landing |
| CS | Checkout Station |
| COMP | Compass |