| Acronym | Meaning |
| RHO | Reduced Hamiltonian Orbital Method |
| ESD | Environmental Services Division (US EPA) |
| HMPGI | Hybrid Multiple-prism Grazing-incidence |
| THG | Third Harmonic Generation |
| 2PPE | Two-photon Photoemission |
| DSVI | Diluted Sludge Volume Index |
| MOZART | Model For OZone And Related Chemical Tracers |
| PXRF | Polarized X-ray Fluorescence |
| DMDS | Dimethyl Disulfide |
| RESOLVE | Research On Operations Limiting Visual Extinction |