| Acronym | Meaning |
| UNDS | Uniform National Discharge Standards |
| PDS | Photothermal Deflection Spectroscopy |
| DARC | Dielectric Antireflection Coating |
| VLBA | Very Long Baseline Array |
| MS | Mass Spectrometer |
| OIT | Oxidative Induction Time |
| ASA | At. Sphere Approxn. |
| JGOFS | Joint Global Ocean Flux Study |
| METC | Morgantown Energy Technology Center |
| FIMS | Field Ionization Mass Spectrometry |