| Acronym | Meaning |
| MMS | Multi-mission Modular Spacecraft |
| VTHL | Vertical Takeoff Horizontal Landing |
| RASC | Royal Astronomical Society Of Canada |
| JEM | Japanese Experiment Module |
| IAPPP | International Amateur/Professional Photoelectric Photometry |
| ICE | International Cometary Explorer |
| DOE | Department Of Energy |
| SB | Spiral |
| TIROS | Television InfraRed Observation Satellite |
| GOMOS | Global Ozone Monitoring By Occultation Of Stars |