| Acronym | Meaning |
| OPR | Office Of Primary Responsibility |
| SMS | Shuttle Mission Simulator |
| OH | Overhead |
| SRT | Shuttle Requirements Traceability |
| GCU | Gyro Coupling Unit |
| EC | Element Contractor |
| FLOT | Flotation |
| FCH | Flight Controllers Handbook |
| DRD | Data Requirements Document |
| PDM | Processor Data Monitor |