| Acronym | Meaning |
 | TTHM | Total Trihalomethane |
| CNDO/2-FA | Complete Neglect Of Differential Overlap First Approxn. |
| NTO | Natural Transition Orbital Method (for Excited States) |
| WRAP | Waste Receiving And Processing |
| GLWQA | Great Lakes Water Quality Agreement |
| HESP | Human Exposure To Soil Pollutants |
| LCPA | Local Coherent Potential Approximation |
| CRE | Carbon Removal Efficiency |
| SIR-C | Spaceborne Imaging Radar-C |
| SMOW | Standard Mean Ocean Water |
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