| Acronym | Meaning |
| MACT | Maximum Achievable Control Technology |
| HMSA | Hybrid Mean Spherical Approximation |
| IBS | Ion Backscattering Spectroscopy |
| AH | Aryl Hydrocarbon |
| BHMT | Betaine-homocysteine Methyltransferase |
| BCF | Bioconcentration Factor |
| CEPP | Chemical Emergency Preparedness Plan |
| CSPI | Coherent State Path Integration |
| RIOS | Reactive Infinite-order Sudden (at.-mol. Reactive Collisions) |
| SCS | Semiclassical Coupled-states |