| Acronym | Meaning |
| AMD | Alpha Activity Median Diameter |
| IWRA | International Water Resources Association |
| MKS | Meter-kilogram-second System Of Measurement |
| MM90 | N/A |
| AFD | Axial Flux Difference |
| DMSP | Defense Meteorological Satellite Program |
| CCN | Cloud Condensation Nuclei |
| SPO | Sacramento Peak Observatory |
| CAGEX | CERES/ARM/GEWEX Experiment |
| GLONET | Global Ozone Observing System |