| Acronym | Meaning |
| ETF | Exponential-type Function (an Ao) |
| NAA | Nonattainment Area |
| RAN | Residual Acrylonitrile |
| CCID | Confidential Chemicals Identification System |
| CFSAN | Center For Food Safety & Applied Nutrition |
| MCEB | Multiconfiguration Energy Bound |
| ACEI | Angiotensin Converting Enzyme Inhibitor |
| MINOS | Main Injector Neutrino Oscillation Search |
| PZC | Potential Of Zero Charge |
| TFR | Thin Film Resonator |