| Acronym | Meaning |
| PPB | Parts Per Billion |
| HT | Herzberg-Teller (wave Functions) |
| CXMS | Conversion X-ray Mossbauer Spectroscopy |
| QENS | Quasielastic Neutron Scattering |
| HRMS | High Resolution Mass Spectrometry |
| SCEMR1 | Soil Chemical Exchange And Migration Of Radionuclides Model |
| AFFF | Aqueous Film-forming Foam |
| SAR | Sodium Absorption Ratio |
| PFWM | Parametric Four-wave Mixing |
| DHF | Decoupled Hartree-Fock |