| Acronym | Meaning |
| ASI | Advanced Study Institute (NATO) |
| RAO | Remedial Action Objective |
| EBIR | Energy Based Integral Retention (in Electronic-structure Calcns.) |
| FEES | Field Electron Energy Spectroscopy |
| BLC | Borderless Contact |
| FZP | Fresnel Zone Plate |
| SDTQ-MBPT | Single-double-triple-quadruple Excitation (contribution) MBPT |
| HWTC | Hazardous Waste Treatment Council |
| QLAR | Quantitative Localization Activity Relationship |
| XRPD | X-ray Powder Diffraction |