| Acronym | Meaning |
| PDR | Photodissociation Region |
| MLSC | Microvolume Laser Scanning Cytometry |
| TSMS | Thermospray Mass Spectrometry |
| UKMO | United Kingdom Meteorological Office |
| LPAS | Long Pathlength Absorbance Spectroscopy |
| ASDWA | Association Of State Drinking Water Administrators |
| MOS | Metal Oxide Semiconductor (FET Devices) |
| OAQPS | Office Of Air Quality Planning And Standards |
| NCCLS | National Committee For Clinical Laboratory Standards |
| QAP | Quality Assurance Plan |