| Acronym | Meaning |
 | TRACS | Trends In Atmospheric Constituents Study |
| DRIPSS | Drinking Water Information Processing Support System |
| TXRF | Total Reflection X-ray Fluorescence |
| USN | Ultrasonic Nebulizer |
| MNDO-HE | Modified Neglect Of Diatomic Overlap-half Electron |
| CGO | Configuration Generating Orbital (a Type Of MO) |
| IDEAL | International Digital Electronic Access Library |
| NSF | National Sanitation Foundation |
| SWA | Slow-wave Activity |
| CCA | Close-coupling Approximation |
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