| Acronym | Meaning |
| THEO | Theoretical |
| REINF | Reinforce |
| NOCC | Network Operations Control Center (GSFC) |
| B/SEC | Bits Per Second |
| LMCC | Integrated Mission Control Center |
| SMD | Spacelab Mission DeveloPment |
| ECI | Earth Centered Inertia (inertials) |
| P&M | Program Milestone |
| RTCS | Real-Time Computer System |
| MOCR | Mission Operations Control Room |