| Acronym | Meaning |
| DCPA | Dynamic Coherent Potential Approxn. |
| ENAN | Education Native American Network |
| NRC | Nuclear Regulatory Commission |
| WGSATM | Working Group On The Statistical Aspects Of Trend Monitoring (ICES) |
| ICAP | Inductively Coupled Argon Plasma |
| NHE | Normal Hydrogen Electrode |
| NSSDC | National Space Science Data Center |
| WPCR | Water Pollution Control Research (US EPA) |
| CT | Charge Transfer |
| IRMS | Isotope Ratio Mass Spectrometry |