| Acronym | Meaning |
| XEOL | X-ray Excited Optical Luminescence |
| LALLS | Low Angle Laser Light Scattering |
| HAPEX | Hydrological And Atmospheric Pilot Experiment |
| DDRPA | Double Direct Random Phase Approximation |
| NAME | Nuclear Accident Modeling Exercise [a Model] |
| CIOS | Classical Infinite Order Sudden (in Atom-mol. Reaction Calcns.) |
| DRIPSS | Drinking Water Information Processing Support System |
| MEP | Matrix Effective Potential (for Scattering Calcns.) |
| NAIMA | North American Insulation Manufacturers Association |
| ACWA | American Clean Water Association |