| Acronym | Meaning |
| AEES | Auger Electron Emission Spectroscopy |
| WQBEL | Water Quality-based Effluent Limits |
| CH-CI | Core Hole Configuration Interaction |
| POF | Polymer Optical Fiber |
| TXRF | Total Reflection X-ray Fluorescence |
| MPW | Multiple Plane Wave (in Electronic-property For Metals) |
| SAMS | Stratospheric And Mesospheric Sounder |
| HSA | Hyperspherical Adiabatic (for Resonances In Electron-atom Scattering. Energy Levels |
| NPSO | Nonpaired Spatial Orbital |
| CELISA | Competitive Enzyme-linked Immunoabsorbent Assay |