| Acronym | Meaning |
| HFF | Hellmann-Feynman Force Approximation |
| NCSCI | National Center For Standards And Certification Information |
| DSA | Digital Subtraction Angiography |
| CCMC-T2 | Coupled-cluster Multiconfigurational (double-excitation Method With Cluster Operator Approximated By T2) |
| EACVD | Electron-assisted Chemical Vapor Deposition |
| GDOES | Glow Discharge Optical Emission Spectrometry |
| IDWSSD | International Drinking Water Supply And Sanitation Decade (of UN |
| QMO | Quaternionic Molecular Orbital Method |
| TSMR | Thickness-shear-mode Resonator |
| ZCC | Zero Core Contribution (model For Photodetachment Calcns.) |