| Acronym | Meaning |
| NLDFT | Nonlocal Density Functional Theory |
| ETF | Exponential-type Function (an Ao) |
| ESP | Electrostatic Precipitator |
| PDI | Polarization-division Interferometry |
| POU | Point Of Use |
| IMPROVE | Interagency Monitoring For Protected Visual Environments |
| ED | Effective Dose |
| NICNAS | National Industrial Chemicals Notification And Assessment Scheme (Australia) |
| OSM | US Office Of Surface Mining Reclamation And Enforcement |
| NVPA | No-virtual-pair Approxn. |