| Acronym | Meaning |
| METAALICUS | Mercury Experiment To Assess Atmospheric Loading In Canada And The US |
| BPC | Bonded-phase Chromatography |
| ACSI | Accelerated Strategic Computing Initiative (for Fusion Reactor) |
| PCDE | Polychlorinated Diphenyl Ethers |
| BAP | Bioavailable Phosphorus |
| FNA | Fine-needle Aspiration |
| DTCI | 3,3'-diethylthiacarbocyanine Iodide |
| ACO | Atomic-cell Orbital |
| IIASA | International Institute Of Applied Systems Analysis (near Vienna |
| PFC | Polarized Frozen Core Approximation |