| Acronym | Meaning |
| SD-POE | Sigma-dependent Pi-orbital Electronegativity Model |
| LBF | Local Basis Function Method (for Solid State Band Structure) |
| BEI | Biological Exposure Indices |
| TAT | Technical Assistance Team |
| OMEX | Ocean Margin Exchange |
| SPF | Simons-Parr-Finlan (potential Function) |
| ZQS | Zero-quantum Spectroscopy |
| SPEAR | Stanford Positron Electron Accelerating Ring |
| RDF | Restricted Dirac-Fock (quantum Calcn. Method) |
| RAS | Renin-angiotensin System |