| Acronym | Meaning |
| HEX | Hexagon |
| MSA | Minimum Surface Area |
| DDM | Data Display Monitoring |
| ICOS | Improved Crew Optical Sight |
| MPG | Multipoint Grounding |
| RDP | Requirements Development Plan |
| MICIS | Material Information Control And Information System |
| FACS | Finance And Control System |
| MCP | Measurements Control Procedure |
| SAA | South Atlantic Anomaly |