| Acronym | Meaning |
| NREP | National Registry Of Environmental Professionals |
| GHSV | Gas Hourly Space Velocity |
| WQMSGL | Water Quality Modeling System For The Great Lakes |
| SETS | Superfund Enforcement Tracking System |
| ATP | Adenosine Triphosphate (reg: 56-65-5) |
| IUPHAR | International Union Of Pharmacology |
| CCDIS | Charge-coupled Device Imaging Spectrometer |
| ABR | Auditory Brainstem Response |
| QTCS | Quantum Theorem Of Corresponding States |
| LAWG | Laboratory Accreditation Working Group |