| Acronym | Meaning |
 | NLDP | National Launch Development Program |
| MACS | Modular Attitude Control System |
| SPTN | SPARTAN |
| ELV | Expendable Launch Vehicle |
| HPFTP | High Pressure Fuel Turbopump |
| SME | Solar Mesosphere Explorer |
| UFO | Unidentified Flying Object |
| USMP | United States Microgravity Payload |
| LDEF | Long Duration Exposure Facility |
| SMM | Solar Maximum Mission |
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