| Acronym | Meaning |
| BPEO | Best Practicable Environmental Option |
| RE | Recoupled States (in Orbiting Resonances Calcns. In Atom-mol. Inelastic Scattering) |
| HUG | HART User Group |
| ETAAS | Electrothermal Atomic Absorption Spectrometry |
| PMC-SCF | Pair Multiconfiguration-SCF (with Electron Pair Optimization) |
| CI-HY | Configuration Interaction-Hylleraas |
| MMA | Methyl Methacrylate |
| MOU | Memorandum Of Understanding |
| GFQMC | Green Function Quantum Monte Carlo |
| GOEZS | Global Ocean Euphotic Zone Study |