| Acronym | Meaning |
| NKN | Sodium Potassium Niobate |
| AMSA | Association Of Metropolitan Sewerage Agencies |
| ATA | Average T-matrix Approximation |
| SCF2 | Two-electron Self-consistent Field |
| SRC | Selective Reduction Catalysts (for Denitration) |
| MOVBET | Molecular Orbital (into) Valence Bond Exponential Transformation |
| WEEL | Workplace Environmental Exposure Limits |
| SAS | Surface-active Substance |
| PSD | Particle Size Distribution |
| PR | Preliminary Review |