| Acronym | Meaning |
| HHG | High-order Harmonic Generation |
| HEK | Human Embryonic Kidney |
| SPT | Selective Polarization-transfer |
| TRAIL | Tumor Necrosis Factor Related Apoptosis Inducing Ligand |
| HGSI | The Human Genome Sequencing Index |
| MLD | Median Lethal Dose |
| HWRTF | Hazardous Waste Restrictions Task Force |
| AWQC | Ambient Water Quality Criteria |
| RADW | Rotationally-adiabatic Distorted-wave |
| IFPM | Independent Fermi Particle Model (in Atom-ion Impact Ionization) |