| Acronym | Meaning |
 | HB | Horizontal Branch |
| SSRV | Solar-Sail Race Vehicle |
| UTC | Coordinated Universal Time |
| VTHL | Vertical Takeoff Horizontal Landing |
| WMO | World Meterological Organisation |
| SR | Special Relativity |
| SPOT | Systeme Probatoire Pour L'Observation De La Terre |
| CBR | Cosmic Background Radiation |
| APT | Automatic Picture Transmission |
| MTC | Man Tended Capability |
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