| Acronym | Meaning |
| METEOSAT | METEOrological SATellite (European) |
| ABS | Advanced Baseline Sounder |
| HST | Hubble Space Telescope |
| ATOVS | Advanced TIROS Operational Vertical Sounder |
| SBUV | Solar Backscatter UltraViolet Radiometer (EOS) |
| ESE | Earth Science Enterprise (NASA) |
| DXS | Diffuse X-ray Spectrometer |
| IRIS | Infrared Radiation Interferometer Spectrometer (1960s) |
| MB OR MB | Megabytes (or Megabits) |
| AOT | Aerosol Optical Thickness |