| Acronym | Meaning |
| IRI | International Reference Ionosphere |
| SO SCF | Spin-optimized Self-consistent Field |
| HFIR | High Flux Isotope Reactor |
| ERAD | Economic And Regulatory Analysis Division (OPPE) |
| GFF | Green Function Formalism |
| GWPS | Groundwater Protection Strategy |
| RMM | Relative Molecular Mass |
| APNO | Atomic Pair Natural Orbital |
| MAB | Monoclonal Antibodies |
| BPFT | Bohm-Pines-Fock-Tani (Hamiltonian In Calcns. On Plasmons) |