| Acronym | Meaning |
| ACL | Alternative Concentration Limit |
| SAR | Sequential Adiabatic Reduction |
| WQA | Water Quality Association |
| AIRS | Atmospheric Information Retrieval System |
| CGTO | Cartesian Gaussian-type Orbital |
| EGM | Electron Gas Model |
| NPY | Neuropeptide Y |
| APO | Aq.-phase Oxidn. |
| MIS | Mobile Incineration System |
| PMN | Lead Magnesium Niobate |