| Acronym | Meaning |
| PIRG | Public Interest Research Group |
| MSG | Monosodium Glutamate |
| VLBI | Very Long Baseline Interferometry |
| IEM | Immunoelectron Microscopy |
| MRI | Magnetic Resonance Imaging |
| RSMP | Rayleigh-Schroedinger-Moeller-Plesset Perturbation |
| ISI | Information Systems Inventory |
| MSMO | Multiple Scattering Molecular Orbital Method (also Known As X(alpha) Scattered-wave) |
| FAGE | Fluorescence Assay With Gas Expansion |
| BOVB | Biorthogonal Valence Bond |