| Acronym | Meaning |
| ECDIN | Environmental Chemicals Data And Information Network |
| EBT | Electron Beam Tomography |
| ACAR | Angular Correlation Of Annihilation Radiation |
| LORG | Localized Orbital-local Origin |
| FORS | Fully Optimized Reaction Space |
| RCM | Radiative Convective Model (of Climate) |
| HEM | Human Exposure Model |
| OEH | One-electron Hamiltonian (quantum Method) |
| CBR | Cosmic Background Radiation |
| ETBE | Ethyl Tert Butyl Ether |