| Acronym | Meaning |
| OMIS | Operational Management Information System |
| PGA | Pressure Garment Assembly |
| DI | Development Integration |
| RW | Response Word |
| VTS | Vertical Test System |
| ETA | Estimated Time Of Arrival |
| HRS | Hours |
| EWA | Estimated Warehouse Arrival |
| HE | Helium |
| GFE | Government Furnished Equipment |