| Acronym | Meaning |
| PIPECO | Photoion-photoelectron Coincidence Spectroscopy |
| SU-MRCC | State Universal-multireference Coupled Cluster |
| VU-LCC | Valence-universal-linear Coupled Cluster |
| RACT | Reasonably Available Control Technology |
| VSWR | Voltage Standing Wave Ratio |
| SALQR | Successive Approximation Linear Quadratic Regulator (for Groundwater Management) |
| FGR | Flue Gas Recirculation |
| VDRE | Vitamin D-responsive Element |
| HAC | Hydrogen-assisted Cracking |
| FISCI | Final Ionic State Configuration Interaction |