| Acronym | Meaning |
| ATCS | Active Thermal Control System |
| PSF | Point Spread Function |
| MOC | Mars Observer Camera |
| CELSS | Controlled Ecological Life Support System |
| UTC | Coordinated Universal Time |
| CSM | Command And Service Module |
| IOA | Institute Of Astronomy (Cambridge) |
| LDEF | Long Duration Exposure Facility |
| IFEA | Integrated Furnace Experiment Assembly |
| OV | Orbital Vehicle |