| Acronym | Meaning |
| HREE | Heavy Rare Earth Element(s) |
| PCD | Photoconductive Decay |
| TDCHF | Time-dependent Coupled Hartree-Fock |
| FODA | Fiber Optic Doppler Anemometry |
| CGL | Comprehensive General Liability Policy |
| SOEF | Specific Odor Emission Factor (odor Source Evaluation) |
| NIGA | Neutron Induced Gamma Activity |
| HZ | Hertz (one Cycle Per Second) |
| PON | Particulate Organic Nitrogen |
| EEAES | Electron-excited Auger Electron Spectroscopy |