| Acronym | Meaning |
| MTO | Maximum Time Out |
| MM | Millimeter |
| GCIL | Ground Command Interface Logic |
| MCCC | Mission Control And Computing Center |
| MECF | Main Engine Computational Facilities |
| DME | Distance-measuring Equipment |
| H | AlH AlHorizontal |
| FCS | Flight Control System |
| GCTS | Ground Communication(s) Tracking System |
| LCO | MMCUniform Central Number |