| Acronym | Meaning |
| RISA | Radioimmunosorbent Assay |
| NTGS | Air/Superfund National Technical Guidance Study |
| LMO | Localized Molecular Spin Orbital |
| FASEB | Federation Of American Societies For Experimental Biology |
| FTS | Fourier Transform Spectroscopy |
| OEMTB | One-electron Mol. Tight-binding (for Electronic Structure) |
| OCEE | Overlap Corrected Electronegativity Equalization |
| MIH | Method Of Intermediate Hamiltonians |
| CLCC | Ceramic Leaded Chip Carrier |
| CDD | Charge-density Distortion |