| Acronym | Meaning |
| ARRPA | Air Resources Regional Pollution Assessment Model |
| AFC | Assimilation (with) Fractional Crystallization (geochemistry) |
| HNS | Explosive |
| AOVB | Atomic Orbital Valence Bond (molecular Wave Function) |
| LPPS | Low-pressure Plasma Spraying |
| ACE | Angiotensin-converting Enzyme |
| PTGS | Picosecond Transient Grating Spectroscopy |
| USCM | Unified Solvation Cavity Model |
| HRT | Hormone Replacement Therapy |
| EIC | Electrostatic Interaction Chromatography |