| Acronym | Meaning |
| CAPMON | Canadian Air And Precipitation Monitoring Network |
| PIRANHA | Pesticide And Industrial Chemical Risk Analysis And Hazard Assessment |
| PSS | Perturbed Stationary State |
| LADD | Lifetime Average Daily Dose |
| AMTEC | Alkali Metal Thermoelectric Converter |
| HLAO | High-lying Antibonding Orbital |
| CPAA | Charged Particle Activation Analysis |
| L2 | Square Integrable (wave Function) (in Electron-atom Or -mol. Collisions) |
| NTS | Nevada Test Site |
| SCOTCH | Spin Coherence Transfer In Chemical Reactions |