| Acronym | Meaning |
| PMC-SCF | Pair Multiconfiguration-SCF (with Electron Pair Optimization) |
| COMA | Cyclic Olefin Maleic Anhydride |
| NIRE | National Institute For Resources And Environment |
| MECA | Molecular Emission Cavity Analysis |
| RSW | Resistance Spot Welding |
| ESWTR | Enhanced Surface Water Treatment Rule |
| NTIMS | Negative Thermal Ionization Mass Spectrometry |
| AACI | Association Of American Cancer Institutes |
| HRXRD | High Resolution X-ray Diffraction |
| VSS | Volatile Suspended Solids |