| Acronym | Meaning |
| H | AlH AlAltitude Rate |
| IB | Inboard |
| PR | Purchase Request |
| SEM | Seller's Engineering Memo |
| HMP | Hydrozene Monopropeflant (RCS Propellant) |
| M+R | Time In Days Before Move Operations |
| BMU | Bus Monitor Unit |
| DAIS | Data Avionics Information System |
| OIC | Orbiter (Orbital) Integrated Checkout |
| ASCII | American Standard Code For Information Interchange |