| Acronym | Meaning |
| CDIAC | Carbon Dioxide Information Analysis Center |
| CSACM | Canonical Statistical Adiabatic Channel Model (in Reactions) |
| HCS | Heliospheric Current Sheet |
| EORCU | European Ozone Research Coordinating Unit |
| FEIS | Final Environmental Impact Statement |
| EBPR | Enhanced Biol. Phosphorus Removal |
| CERES | Cloud And The Earth's Radiant Energy System |
| MMO | Mixed-mode Oscillation |
| ACEEE | American Council For An Energy Efficient Economy |
| PCBN | Polycrystalline Cubic Boron Nitride |