| Acronym | Meaning |
| ETC | Greenbelt |
| SUSIM | Solar Ultraviolet Spectral Irradiance Monitor |
| MILLS | Modular Integrated Utility Systems |
| SYNCOM | Hughes Spin Stabilized Spacecraft |
| SRR | Shuttle Requirements Review |
| PVA | PreburnerValveActuator |
| VI | Internal Velocity |
| OPL | Operational |
| UC | Unsatisfactory Condition |
| EGRET | Energetic Gamma Ray Explorer Telescope |