| Acronym | Meaning |
| NCEH | National Center For Environmental Health |
| TDVP | Time-dependent Variational Principle (in Scattering Calcns.) |
| UDI | Utility Data Institute (power Generation) |
| ITC | Interagency Testing Committee (TSCA) |
| VSQG | Very Small Quantity Generator |
| WDS | Wavelength-dispersive Spectrometry |
| MNT | Molecular Nanotechnology |
| PSII | Plasma Source Ion Implantation |
| NEJAC | National Environmental Justice Advisory Council |
| NEMI | National Environmental Methods Index |