| Acronym | Meaning |
| DTA | Direct Toxicity Assessment (of Wastewater Discharges) |
| GPD | Gaussian Phase Distribution |
| HAT | Humid-air Turbine [cycle] |
| MC-TD-SCF | Multiconfiguration-time Dependent-self-consistent Field |
| SPF | Sun Protection Factor |
| RQ | Reportable Quantity |
| PPIC | Pollution Prevention Information Clearinghouse |
| ERDA | US Energy Research And Development Administration |
| LAOM | Localized At. Orbital Method (in Electronic Structure Calcn.) |
| FEMP | Fernald Environmental Management Project |