| Acronym | Meaning |
| OBK | Oppenheimer-Brinkman-Kramers (approxn. In Atom-ion Electron-exchange Calcns.) |
| SOS | Surfaces Of Section Method (semiclassical Calcn. Of Eigenvalues) |
| CMNOS | Complementary Metal Nitride/Oxide Semiconductor |
| NAREL | National Air And Radiation Environmental Laboratory |
| ENSO | El Nino Southern Oscillation |
| NRDAM | Natural Resource Damage Assessment Model |
| SOCI | Society Of Chemical Industry |
| KKR-GF | Korringa-Kohn-Rostoker-Green Function |
| NEDB | National Exposure Database (HSE) |
| CNDO/SW | Complete Neglect Of Differential Overlap / Sichel-Whitehead |