| Acronym | Meaning |
| MACT | Maximum Achievable Control Technology |
| PAEP | Photovoltaic Array Environmental Protection Program |
| ITMS | Ion Trap Mass Spectrometer |
| TARC | Tiered Area Response Capability |
| IECA | International Erosion Control Association |
| HDS-MAT | Hydrodesulfurization Micro-activity Test |
| RRPA | Renormalized Random-phase Approxn. |
| GBIF | Global Biodiversity Information Facility |
| CIHT | Configuration-interaction Hylleraas-type (wave Function) |
| EDMR | Electrically Detected Magnetic Resonance |