| Acronym | Meaning |
 | ISPM | International Solar Polar Mission |
| HTHL | Horizontal Takeoff Horizontal Landing |
| RHC | Rotational Hand Controller |
| DAO | Dominion Astrophysical Observatory |
| ETR | Eastern Test Range |
| AMOS | Air Force Maui Optical System |
| SLF | Shuttle Landing Facility |
| GDS | Great Dark Spot |
| DMSP | Defense Meteorological Satellite Program |
| USO | Ultra-Stable Oscillator |
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