| Acronym | Meaning |
| QFEB | Quasi-free Electron Bremsstrahlung |
| PSB | Product Safety Branch |
| IAPA | Independent Asymptotic Pair Approxn. (in Electronic Structure) |
| PHD | P-helicity Decoupling Scheme (p=momentum) |
| CVFF | Consistent Valence Force Field |
| TSCA | Toxic Substances Control Act |
| SBSR | Single Bead String Reactor |
| ACC | Aquifer Contamination Control |
| LEACHM | Leaching Estimation And Chemistry Model |
| TMDSC | Temperature-modulated Differential Scanning Calorimetry |