| Acronym | Meaning |
| AISI | American Iron And Steel Institute |
| RFC | Inhalation Reference Concentration |
| GERD | Gastroesophageal Reflux Disease |
| CMT | Charcot-Marie-tooth Disease |
| NCP | National Contingency Plan (Superfund) |
| MWP | Mixed Waste Paper |
| GLAO | Generalized Localized Ao |
| PFOE | Polarized First-order Exchange |
| EQPAC | Equatorial Pacific Study |
| PEMS | Predictive Emission Monitoring System |