| Acronym | Meaning |
| DZD | (double Zeta)-diffuse (basis Set In Configuration-mixing MO Calcns. On Mols.) |
| VSTA | Virus-Serum-Toxin Act |
| STEREO | Solar TErrestrial RElations Observatory |
| PLFA | Phospholipid Fatty Acid |
| FGEF | Federal Geographic Encoding Format |
| QR-MWH | Quasi-relativistic Mulliken-Wolfsberg-Helmholz Method |
| TCDW | Target Continuum Distorted-wave (in At.-collision Calcns.) |
| LARIS | Laser Ablation And Resonance Ionization Spectroscopy |
| ADGIXA | Angular-dependent Glancing-incidence X-ray Analysis |
| PSD | Passive Sampling Device(s) (for Air Pollution) |