| Acronym | Meaning |
| R | Rehydratable |
| GS | Gas Servicer |
| ICIO | Interim Cargo Integration Operations |
| CIS | Communication Interface System |
| MVA | Megavolt Ampere |
| OHA | Orbital Height Adjustment Maneuver |
| CSD | LCharles Stark Draper Laboratory (MIT) |
| IVAR | Internal Variable |
| RTCC | Real-Time Computer Complex |
| DCR | Design Certification Review |