| Acronym | Meaning |
| SMDE | Static Mercury Drop Electrode |
| CDS | Compliance Data System (US EPA Air Database) |
| OZIPM | Ozone Isopleth Plotting With Optional Mechanisms |
| MESP | Molecular Electrostatic Potential |
| CAS-MC-SCF | Complete Active Space-multiconfiguration-SCF |
| RFI | Radio Frequency Interference |
| PBFFF | Potential Barrier Field-flow Fractionation |
| WAND | Wide Angle Neutron Diffraction |
| MLSS | Mixed Liquor Suspended Solids |
| PRA | Probabilistic Risk Assessment |