| Acronym | Meaning |
| EPOP | European Polar Orbiting Platform |
| UI | Unit Of Issue |
| MATCH | McGill University; Technical Improvements To The Large-scale Spectral Element Ocean Model (SEOM) |
| ADI | Air Defense Initiative |
| SOI | Solar Oscillations Imager |
| PRE-STORM | Preliminary Regional Experiment-STORM |
| ARCC | American Rivers Conservation Council |
| NHSRP | National Hail Suppression Research Program |
| ANSS | American Nature Study Society |
| CASS | Computer-Assisted Surveillance System |