| Acronym | Meaning |
| PEN | Polyethylene Naphthalate |
| MG-FSGO | Multiple Gaussian-floating Spherical Gaussian Orbital Method |
| HAM/N | Hydrogenic Atoms In Molecules |
| ICPAEMC | International Commission For Protection Against Environmental Mutagens And Carcinogens |
| ANEP | Association Of Northwest Environmental Professionals |
| LCR | Ligase Chain Reaction |
| SDI | Silt Density Index |
| NOD | Nitrogenous Oxygen Demand |
| FHMO | Fenske-Hall MO |
| INAA | Instrumental Neutron Activation Analysis |