| Acronym | Meaning |
| IWEM | Institution Of Water And Environmental Management |
| QPM | Quasiparticle Phonon Model |
| CHF | Coupled Hartree-Fock |
| BAO | Best Atomic Orbital Basis |
| EXPRES | Expert System For Pesticide Regulatory Evaluations And Simulations |
| TCDFT | Two-component Density Functional Theory |
| LCLO | Linear Combination Of Localized Orbitals |
| EGSB | Expanded Granular Sludge Bed |
| EPER | European Pollutant Emission Register |
| STJ | Superconducting Tunnel Junction |