| Acronym | Meaning |
 | ATCS | Active Thermal Control System |
| ELDO | European Launcher Development Organisation |
| RTG | Radioisotope Thermoelectric Generator |
| ISZ | Iskusstvenniy Sputnik Zemli |
| SPAS | Space Pallet Satellite |
| BFS | Backup Flight System |
| SSCE | Solid Surface Combustion Experiment |
| SDIO | Strategic Defense Initiative Organization |
| GMC | Giant Molecular Cloud |
| FRSI | Flexible Reusable Surface Insulation |
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