| Acronym | Meaning |
| CAM | Crassulacean Acid Metabolism (photosynthetic Pathway) |
| CSE | Cigarette Smoke Extract |
| BTCA | Best Technology Currently Available |
| SMARTS | SMiles ARbitrary Target Specification |
| OSW | Office Of Solid Waste (US EPA) |
| GCB | Graphitized Carbon Black |
| CCRM | Coupled-channel Reactance Matrix (in Atom Surface Scattering) |
| RTDM | Rough Terrain Dispersion Model (air Quality) |
| EET | Epoxyeicosatrienoic Acid |
| NOMS | National Organics Monitoring Survey (US EPA 1976-1977) |