| Acronym | Meaning |
| HPI | Hydrocarbon Processing Industry |
| HCG | Human Chorionic Gonadotropin |
| BAT | Back Arc Tectonics |
| NWC | National Water Council (UK) |
| MCEB | Multiconfiguration Energy Bound |
| AIHC | American Industrial Health Council |
| DQMC | Diffusion Quantum Monte Carlo (method In Atom And Mol. Calcns.) |
| IIAES | Ion Induced Auger Electron Spectroscopy |
| CPDAM | Cumulative Potential-derived Atomic Multipole (calcn. Method) |
| DMRQA | Discharge Monitoring Report Quality Assurance |