| Acronym | Meaning |
| CADH | Communications And Data Handling |
| RCI | Rodent Cage Interface |
| CM | Central Meridian |
| ENACEOS | ENAC For EOS |
| TCM | Trajectory Control Maneuver |
| PASS | Primary Avionics Software System |
| ACRV | Assured Crew Return Vehicle |
| DCA | Defense Communications Agency |
| IKI | Institut Kosmischeskikh Issledovaniya |
| ASCO | Arab Satellite Communications Organization |