| Acronym | Meaning |
 | TSS | Targeted Search System / Tethered Satellite System |
| LSR | Local Standard Of Rest |
| ETM | Enhanced Thematic Mapper |
| SOFIA | Stratospheric Observatory For Infrared Astronomy |
| AW&ST | Aviation Week And Space Technology |
| SUSIM | Solar Ultraviolet Spectral Irradiance Monitor |
| MMU | Manned Maneuvering Unit |
| IOBM | In Ocean By Mistake |
| HRSI | High-temperature Reusable Surface Insulation |
| CMB | Cosmic Microwave Background |
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