| Acronym | Meaning |
| PSNO | Pseudonatural Orbital |
| QDPT | Quasi-degenerate Perturbation Theory |
| HFWG | Hollow Fiber Waveguide |
| EMSA | Electron Microscopy Society Of America |
| LDF | Local Density Functional |
| CC | Coupled-cluster (quantum Calcn. Method) |
| CBC | Circulating Bed Combustor (or Incinerator) |
| NIRS | National Inorganics And Radionuclides Survey |
| CARRI | Computerized Assessment Of Relative Risk Impacts |
| F-PURE | Florida Pesticide Use Risk Evaluation |