| Acronym | Meaning |
| NFRAP | No Further Remedial Action Planned |
| PAP | Pancreatitis-associated Protein |
| SCA | Semiclassical Coulomb Approximation |
| MPA | Multipurpose Additive |
| NEMCA | Non-faradaic Electrochemical Modification Of Catalytic Activity |
| WQAS | Water Quality Analysis System (file Within STORET) |
| ST4CCD | Coupled Cluster (with) Double (substitutions And) Single (and) Triple (substitutions Incorporated Via) Fourth-order (perturbat |
| FONDA | First-order Nondegenerate Adiabatic (theory For Electron-mol. Inelastic Scattering) |
| RNA | Ribonucleic Acid |
| OPE | Ozone Production Efficiency |