| Acronym | Meaning |
| MAM | Modified Atoms (in) Molecules |
| OAM | Optical Absorption Microscope |
| IAEH | International Association For Environmental Hydrology |
| ISI | Institute For Scientific Information |
| PT2D | Second-order Perturbation Theory (with) Diagonal (part Of Fock Matrix) |
| TSA | Toluenesulfonic Acid |
| CPK | Creatine Phosphokinase |
| OGC | Office Of General Counsel |
| SECH | Screened Exchange Plus Coulomb Hole Method |
| SRBC | Sheep Red Blood Cell |