| Acronym | Meaning |
| HID | Helium Ionization Detector |
| AUSB | Aerobic Upflow Sludge Blanket |
| ARIA | Atm. Response In Aurora |
| BCR | B Cell Receptors |
| MEG | Mixed Exponentially Generated (wave Function) |
| DZD | (double Zeta)-diffuse (basis Set In Configuration-mixing MO Calcns. On Mols.) |
| IRRS | IR Reflection Spectroscopy |
| NAEP | National Association Of Environmental Professionals |
| ACCR | Activated Carbon Catalytic Reduction |
| BATHEN | Burnable Fuel Abatement Through Efficient Improvement And Nonfossil Fraction Increase |