| Acronym | Meaning |
| PRM | Payload Retention Mechanism |
| CVM | Control Valve Module |
| MDA | Maintainability Design Approach |
| O&C | Operation(s) And Checkout (Building-was MSOB) |
| DPI | Detail Program Interrelationships |
| EPMS | Engineering Performance Management System |
| GW | Gross Weight |
| GASPI | Guidance Attitude Space Position Indicator |
| TSSU | Test Signal Switching Unit |
| RRT | Rendezvous Radar Transponder |