| Acronym | Meaning |
| SCOTCH | Spin Coherence Transfer In Chemical Reactions |
| TAD | Thermophilic Aerobic Digestion (of Sewage Sludge) |
| PO-MO | Pars Orbital-MO |
| MMS | Molecular Modulation Spectroscopy |
| OLSR | Ordinary Least Squares Regression |
| FTC | Federal Trade Commission |
| ANSI | American National Standards Institute |
| GOS | Generalized Oscillator Strength |
| CASPT2 | Complete Active Space With Second-order Perturbation Theory |
| GICS | Grants Information And Control System |