| Acronym | Meaning |
 | SFL | Secondary Freon Loop |
| NUL | Non-GSE Utilization List |
| MTOGW | Maximum Takeoff Gross Weight |
| GSIU | Ground Standard Interface Unit |
| TDU | Time Display Unit |
| PL | Postlanding (P/L Preferred) |
| OFDS | Oxygen Fluid Distribution System |
| OT | Operational Trajectory |
| DMP | Deployable Maintenance Platform |
| RVDT | Rotary Variable Differential Transformer |
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