| Acronym | Meaning |
| ORPI | Off-resonance Proton Irradiation |
| CVA-MO | Core-valence Approxn.-MO (for At. Integral Calcns.) |
| ALK | Anaplastic Lymphoma Kinase |
| AASHO | American Association Of State Highway Officials |
| ZPP | Zn Protoporphyrin (lead Poisoning Indicator) |
| RECA | Regional Energy Convergence Approxn. (in Total Energies Calcns.) |
| AICR | American Institute For Cancer Research |
| PCET | Proton-coupled Electron Transfer |
| DCBA | Distorted-coupling Born Approximation |
| CSE | Correction (with The) Statistical Exchange Potential |