| Acronym | Meaning |
 | RZWQM | Root Zone Water Quality Model |
| POTDR | Polarization Optical Time Domain Reflectometry |
| ZLC | Zero Length Column |
| MIEMS | Membrane Inlet Electrochemical Mass Spectrometry |
| ORO | Office Of Regional Operations |
| BFR | Brominated Flame Retardant(s) |
| NACLA | The National Cooperation For Laboratory Accreditation |
| SAMPEX | Solar Anomalous And Magnetospheric Particle Explorer (spacecraft) |
| BPH | Benign Prostatic Hyperplasia |
| SOR | Surface Overflow Rate |
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