| Acronym | Meaning |
| SSMS | Spark Source Mass Spectrometry |
| APP | Acoustic Phase Plate |
| EBMUD | East Bay Municipal Utility District (Oakland |
| APD | Azimuthal Photoelectron Diffraction |
| CLS | Characteristic Loss Spectroscopy |
| VSSP | Viscous Suspension Spinning Process |
| PC-BOSS | Particle Concentrator-Brigham Young University Organic Sampling System |
| SPMD | Semipermeable Membrane Device |
| QPF | Quantitative Precipitation Forecasts |
| MINDO | Modified Intermediate Neglect Of Differential Overlap |