| Acronym | Meaning |
| EPA | Environment Potential Approach (in Electronic-structure Calcn.) |
| ATDC | After Top Dead Center (gasoline And Diesel Engine Timing) |
| BLNK | B Cell Linker Protein |
| CHMM | Certified Hazardous Materials Manager |
| TPO | Temperature-programmed Oxidiation |
| SGO | Spherical Gaussian Orbital |
| IAS | Isobaric Analog States |
| VIM | Video-intensified Microscopy |
| GPMAS | Gas Phase Molecular Absorption Spectrometry |
| OPTS | Office Of Pesticides And Toxic Substances (USEPA) |