| Acronym | Meaning |
| MP4(SDTQ) | Moeller-Plesset (perturbation Theory To) 4th Order With Single |
| MTBE | Methyl Tert Butyl Ether (gasoline Additive) |
| MR-SAC | Multireference Symmetry-adapted-cluster (quantum Theory Or Wave Function For Mol. Calcns.) |
| OUST | Office Of Underground Storage Tanks |
| SH2 | Src-homology 2 |
| PIXES | Particle Induced X-ray Emission Spectroscopy |
| BCM | Bond Charge Model (in Force Constants Calcn.) |
| NBSR | Neutron Beam Split-core Reactor |
| EIA | Enzyme Immunoassay |
| LOIS | Loss Of Interim Status |