| Acronym | Meaning |
| RCI | Restricted Configuration Interaction |
| IDA | Isotope Dilution Analysis |
| ELKM | Extended Lumped Kinetic Model |
| NTTC | National Technical Transfer Center |
| FGH | Fourier-grid Hamiltonian |
| RLM | Reflected Light Microscopy |
| PBDD | Polybrominated Dibenzodioxin(s) |
| FAAO | Free-atom Atomic Orbital |
| PBL | Planet Boundary Layer (in Atmospheric Chemistry And Physics) |
| CHF | Coupled Hartree-Fock |