| Acronym | Meaning |
| HPCA | Hierarchical Principal Component Analysis |
| CEQ | Collinear Exact Quantum (method In Reactive-scattering Calcn.) |
| AQG | Air Quality Guideline |
| NDSL | Non-Domestic Substances List |
| NETAC | National Environmental Technol. Applications Corporation |
| DIRLD | Dynamic Infrared Linear Dichroism |
| MCSCRF | Multiconfigurational Self-consistent Reaction Field |
| DLTS | Deep-level Transient Spectroscopy |
| STOAT | Sewage Treatment Operation And Analysis Over Time [model] |
| PAI | Plasminogen Activator Inhibitor |