| Acronym | Meaning |
| INCO | Integrated Communications Officer |
| SMM | Solar Maximum Mission |
| SAA | South Atlantic Anomaly / Single Access Antenna |
| MMH | MonoMethyl Hydrazine |
| GPPF | Gravitational Plant Physiology Facility |
| EOS | Earth Observing System |
| SOHO | SOlar Heliospheric Observatory |
| GR | General Relativity |
| PTC | Passive Thermal Control |
| ELDO | European Launcher Development Organisation |