| Acronym | Meaning |
| AMBIENS | Atmospheric Mass Balance Of Industrially Emitted And Natural Sulfur |
| SPS | Surface Photovoltage Spectroscopy |
| ESEEM | Electron Spin Echo Envelope Modulation |
| APHA | American Public Health Association |
| MESA | Mass Concentration Extinction Size Analyzer |
| AFSB | Anaerobic Fluidized Sludge Blanket |
| CP | Coupled Pair (many-electron Theory) |
| HTL | Hole Transport Layer |
| AOQL | Average Outgoing Quality Limit |
| PDE | Partial Differential Equation |