| Acronym | Meaning |
 | OM | Outer Marker (ILS) |
| MPB | Maintenance Parts Breakdown |
| PDL | Pocket Dosimeter-Low |
| TD | Touch Down |
| PT | Pint |
| DDA | Digital Differential Analyzer |
| SSM | ESpace Shuttle Main Engine |
| FDS | Functional Design Specifications |
| TMF | Transporter Maintenance Facility |
| FXD | Fixed |
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