| Acronym | Meaning |
| CCPA | Cellular Coherent-potential Approximation (for Electronic Structure Calcns.) |
| DCBOX | Distorted Coulomb-Born No-exchange Approxn. |
| CIITA | Class II Transactivator |
| TTSS | Tropospheric Trace Species Sounder |
| BNP | Brain Natriuretic Peptide |
| CIPAC | Collaborative International Pesticides Analytical Council |
| CRAVE | Carcinogen Risk Verification Effort (EPA) |
| CAP | Complex Absorbing Potential |
| TIC | Total Ion Current |
| VERI | Visual-empirical Region Of Influence |