| Acronym | Meaning |
| ZCCSD | Z-vector Coupled Cluster (with) Single (and) Double Excitation |
| ESR | Erythrocyte Sedimentation Rate |
| CASRN | Chemical Abstracts Service Registry Number |
| MPHF | Maximally Paired Hartree Fock |
| TOGA | Tropical Oceans And Global Atmosphere |
| CDW | Coulomb Distorted Wave (for Scattering Calcns.) |
| AI | Agpaitic Index [represents The (Na2O + K2O)/Al2O3 Ratio] |
| VO | Virtual Orbital |
| NIA | National Institute On Aging |
| GT | Gas Turbine |