| Acronym | Meaning |
| ESS | Experiment Subsystem Simulator |
| ODF | Orbit Determination Facility |
| SSUS-A | SSUS For Atlas-Centaur Class Spacecraft |
| UR | Upper Right |
| RFEI | Request For Engineering Information |
| SID | Simulator Interface Devices |
| OG | Zero Gravity |
| SDPC | Shuttle Data Processing Complex |
| DIM | Design Interface Meeting |
| LIM | Limit |