| Acronym | Meaning |
| PWFB | Plane-wave First Born |
| PTGF | Perturbative-type Green Function |
| LCCO | Light Catalytic Cycle Oil |
| TOD | Theoretical Oxygen Demand |
| PPI | Proton Pump Inhibitor |
| RNAI | RNA Interference |
| IVR | Intramolecular Vibrational Energy Redistribution |
| HMTA | Hazardous Material Transportation Act |
| HMWMC | Hazardous Materials And Waste Management Consortium |
| UHF-AA | Unrestricted Hartree-Fock (with Spin) Annihilation |