| Acronym | Meaning |
| IFOT | Invariant Fock Operator Technique |
| CCR | Close-coupled Representation |
| NEWS | National Surface Water Survey (USEPA) |
| FITC | Fluorescein Isothiocyanate |
| GANC | Generalized Acid Neutralization Capacity Test |
| PPM | Path Probability Method |
| RAS | Renin-angiotensin System |
| DE | Destruction Efficiency |
| RIOS | Reactive Infinite-order Sudden (at.-mol. Reactive Collisions) |
| GPMS | Galileo Probe Mass Spectrometer |