| Acronym | Meaning |
| PNRA | Photon-tagged Nuclear Reaction Analysis |
| HOPC | High Osmotic Pressure Chromatography |
| RASA | Regional Aquifer Systems Analysis (program Of USGS) |
| OAQPS | Office Of Air Quality Planning And Standards |
| DFTS | Dispersive Fourier Transform Spectrometry |
| PNC | Parity Nonconservation |
| CFM | Continued-fraction Method |
| FTD | Flame Thermionic Detector (gas Chromatography) |
| LOD | Limit Of Detection |
| ONBI | Oligonucleotide Bridge Intercalator |