| Acronym | Meaning |
| ARPA | Augmented Random Phase Approximation |
| ALIPS | Automated Laser-Induced Phosphorimeter System |
| WERL | Water Engineering Research Laboratory |
| SRFA | Suwanee River Fulvic Acid |
| RPV | Reactor Pressure Vessel |
| HCN | US Historical Climatology Network |
| AQCS | Analytical Quality Control Services |
| TMO | Truncated Molecular Orbital |
| DSO-GF | Diagonal Second Order (approxn. To)-Green Function |
| LCDAO | Linear Combination Of Distorted Atomic Orbitals |