| Acronym | Meaning |
 | SSRI | Selective Serotonin Reuptake Inhibitor |
| RSSCT | Rapid Small-scale Column Test (of Granulated Activated Carbon) |
| SHR | Selective Hybrid Reduction |
| PPGA | Plastic Pin Grid Array [electronic Package] |
| CFD | Computational Fluid Dynamics |
| OMVPE | Organometallic Vapor-phase Epitaxy |
| PSD | Prevention Of Significant Deterioration |
| FWE | Faddeev-Watson Expansion (for T-operator In Atomic Collisions) |
| CCEH | Center For Coastal Ecosystem Health |
| NSR | New Source Review |
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