| Acronym | Meaning |
| PNO-CEPA | Pseudonatural Orbital-coupled Electron Pair Approximation |
| ERP | Emergency Response Planning |
| ELF | Extremely Low Frequency |
| CRHF | Complex-restricted Hartree-Fock |
| MCRRPA | Multiconfiguration Relativistic Random Phase Approxn. |
| SEC | Size Exclusion Chromatography |
| CV | Core-valence Correlation |
| BICMOS | Bipolar Complementary Metal Oxide Semiconductor |
| CINDORU | Cluster INDO Restricted-unrestricted |
| CIRA | COSPAR International Reference Atmosphere |