| Acronym | Meaning |
| LN2 | Liquid Nitrogen |
| RME | Radiation Monitoring Experiment |
| CELSS | Controlled Ecological Life Support System |
| DESAT | Desaturation |
| SNU | Solar Neutrino Units |
| FAP | Freedom Attached Payloads |
| RCT | Radiometric Calibration Target |
| PV | Photovoltaic |
| TAU | Thousand Astronomical Unit |
| HRPT | High Resolution Picture Transmission |