| Acronym | Meaning |
| ICVT | Improved Canonical Variational Theory |
| SOR | Surface Overflow Rate |
| HUG | HART User Group |
| MRB | Multi-stage Reverse-flow Bioreactor |
| NMN | Nicotinamide Mononucleotide |
| OSTLS | Optical Saturation Thermal Lens Spectrometry |
| CNDOL | Complete Neglect Of Differential Overlap-azimutal Quantum Number (of Valence AO'S) |
| REM | Reservoir Eutrophication Model |
| EPQU | IFCC Expert Panel On Quantities And Units |
| WQC | Water Quality Criteria |