| Acronym | Meaning |
| STP | Standard Temperature And Pressure |
| QUASAR | Quality Simulation Along Rivers (environmental Model) |
| SEE | Secondary Electron Emission |
| COH | Coefficient Of Haze |
| HAT | Histone Acetyltransferase |
| ZORA | Zeroth-order Regular Approximation |
| JPCRD | Journal Of Physical And Chemical Reference Data |
| NARSTO-NE-OP | North American Research Strategy For Tropospheric Ozone-Northeast Oxidant And Particle Study |
| NNDO | Neglect Of Nonbonded Differential Overlap |
| SXES | Soft X-ray Emission Spectroscopy |