| Acronym | Meaning |
| OPIM | Other Potential Infectious Material |
| PDI | Point Dipole Interaction (model For Mol.-polarizability Calcns.) |
| DVB | Diagrammatic Valence Bond (in Study Of Electronic Properties) |
| RDQ | Reduced-dimensionality Quantum (calcn. Method) |
| MOKE | Magneto-optic Kerr Effect |
| TPY | Total Photon Yield |
| AP | Appearance Potential |
| VCXO | Voltage Controlled Crystal Oscillator |
| EUV | Extreme Ultraviolet |
| IFPM | Independent Fermi Particle Model (in Atom-ion Impact Ionization) |