| Acronym | Meaning |
 | ESTEC | European Space Research And Technology Center |
| E/C | Encoder/Coupler |
| NO | Nitric Oxide |
| OFS | OrbiterFunctionalSimulator |
| LSO | Landing Support Officer |
| DESPOT | Design Performance OPtimization |
| ASTER | Advanced Spaceborne Thermal Emission And Reflection Radiometer |
| TAL | Transoceanic Abort Landing |
| HEAO | High Energy Astronomy Observatory |
| PU | Pickup |
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