| Acronym | Meaning |
| IPVD | Ionized Physical Vapor Deposition |
| RACS | Response Action Contractors |
| IUCHF | Improved Uncoupled Hartree Fock |
| CCL | Drinking Water Contaminant Candidate List |
| FFTF | Fast Flux Test Facility |
| RFM | Relativistic Mean Field |
| LAPW | Linearized Augmented Plane Wave (for Band-structure Calcns.) |
| RSC | Relative Source Contribution |
| CAS-CI | Complete Active Space-configuration Interaction |
| RAC | Reference Air Concentration (USEPA) |