| Acronym | Meaning |
| MCQDA | Multichannel Quantum Defect Analysis |
| PCI | Positive-ion Chemical Ionization (mass Spectrometry) |
| SAMHSA | Substance Abuse And Mental Health Services Administration |
| IBIL | Ion Beam Induced Luminescence |
| EBSD | Electron Back Scatter Diffraction |
| PTA | Packed Tower Aeration |
| TIROS | Television And IR Observation Satellite |
| RPC | Reduced Potential Curve (method For Anal. Of Potential Functions And Spectra Of Diatomic Molecules) |
| FBE | Flat Bed Electrophoresis |
| NWS | National Weather Service |