| Acronym | Meaning |
 | USML | United States Microgravity Laboratory |
| OSTP | Office Of Science And Technology Policy |
| PPM | Positions And Proper Motions (catalog) |
| CPCG | Commercial Protein Crystal Growth |
| ISU | International Space University |
| GSFC | Goddard Space Flight Center |
| TWTA | Travelling Wave Tube Amplifier |
| FGS | Fine Guidance Sensors |
| EDO | Extended Duration Orbiter |
| OSCAR | Orbiting Satellite Carrying Amateur Radio |
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