| Acronym | Meaning |
| HIGH | PressuHigh Pressure |
| EPDS | Electrical Power Distribution Subsystem |
| LV | Low Voltage |
| EDC | Engineering Design Change |
| EV | Expendable Vehicles |
| MG | Magnesium |
| FTS | Federal Telecommunications System |
| GSSA | Ground Support Systems Activation |
| OSTS | Office Of Space Transportation Systems |
| FRCI | Fibrous Refractory Composite Insulation |