| Acronym | Meaning |
| AQCC | Averaged Quadratic Coupled-cluster |
| NPA | Natural Population Analysis |
| CRAVE | Carcinogen Risk Verification Effort (EPA) |
| FFTF | Fast Flux Test Facility |
| MPE | Mean Percent Error |
| CCWP | Close-coupling Wave-packet (for Mol. Scattering) |
| UKAS | United Kingdom Accreditation Service |
| PROWL | Protein Information Retrieval Online World Wide Web Lab |
| PGAA | Prompt Gamma-ray Activation Analysis |
| PTD | Probable Toxic Dose |