| Acronym | Meaning |
| MCS | Measurements Calibration System |
| FFD | Functional Flow Diagram |
| T | Superscript) |
| PMI | Preventive Maintenance Inspection |
| DMG | Data Management Group |
| GMCL | Ground Measurements Command List |
| VCG | Vector Cardiogram |
| OMPR | Operational Maintainability Problem Reporting |
| OCDU | Optics Coupling Data Unit (G&N) |
| RSS | Rotating Service Structure |