| Acronym | Meaning |
| OMEGA | Method In Molecular Orbital Calculations |
| EPM | Electron Probe Microscopy |
| UAQI | Uniform Air Quality Index |
| HPGE | High Purity Germanium |
| SCPT2 | Self-consistent Second-order Perturbation Theory |
| LGM | Last Glacial Maximum (most Recent Era Of Continental Glaciation; See Also PGP) |
| GLIS | Global Land Information System |
| NHE | Na+-H+ Exchanger |
| NGV | Natural Gas Vehicle |
| NES | Neurobehavioral Evaluation System |