| Acronym | Meaning |
 | AE | Arianespace SA |
| TAL | Transatlantic Abort Landing |
| TSTO | Two Stage To Orbit |
| SRM | Solid Rocket Motor |
| FEM | Flight-Engineering Model |
| DFRC | Dryden Flight Research Center |
| FOLD | Federally-Owned LANDSAT Data |
| BNSC | British National Space Centre |
| OCTS | Ocean Color And Temperature Scanner |
| CMB | Cosmic Microwave Background |
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