| Acronym | Meaning |
 | AFETR | USAF's ETR |
| LEDA | On-line Earthnet Data Access |
| SMS | Shuttle Mission Simulator |
| UBM | Unpressurized Berthing Mechanism |
| CITE | Cargo Integration Test Equipment |
| NASP | National AeroSpace Plane |
| GTO | Geostationary Transfer Orbit |
| GC | Globular Cluster |
| AXAF | Advanced X-ray Astrophysics Facility |
| NAS | Numerical Aerodynamic Simulation |
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