| Acronym | Meaning |
| ATMOS | Atmospheric Trace Molecule Spectroscopy |
| CT | Disinfection Concentration Contact Time |
| EROS | Elaboration Of Reactions For Organic Synthesis |
| HPAE | High Performance Anion Exchange |
| MWCO | Molecular Weight Cut-off (in Membrane |
| RNRA | Resonant Nuclear Reaction Analysis |
| WTA | Wind Trajectory Analysis (for Airborne Particulate Samples) |
| SDR | Spin-dependent Resonance |
| NLLSQ | Nonlinear Least Squares |
| CMS | Comprehensive Modeling System |