| Acronym | Meaning |
| IDMS | Isotope Dilution Mass Spectrometry |
| DIAL | Differential Absorption Lidar (laser Radar Sensing) |
| MC-SEA | Multichannel Static-exchange Approximation |
| CAEC | Center For Analysis Of Environmental Change |
| EAM | Energy Absorbing Molecules |
| BIR | Baculovirus IAP Repeat |
| NASP | National Aerospace Plane |
| MCPA | 2-methyl-4-chlorophenoxyacetic Acid |
| EFD | Explicit Finite Difference |
| NEM | NAAQS Exposure Model |