| Acronym | Meaning |
| AQO | Average Quadrupole Orientation |
| NOM | Natural Organic Matter |
| LTER | Long Term Ecological Research |
| TPU | Thermoplastic Polyurethane |
| ADMS | Atmospheric Dispersion Modeling System |
| DOUBTFUL | Double Quantum Transitions For Finding Unresolved Lines |
| VPC | Vapor-phase Chromatography |
| IGAIM | Individual Gages (for) Atoms In Molecules |
| KADP | Kentucky Acid Deposition Program |
| RPD | Relative Percent Difference |