| Acronym | Meaning |
| PCT | Patent Cooperation Treaty |
| MSMO | Multiple Scattering Molecular Orbital Method (also Known As X(alpha) Scattered-wave) |
| BPL | Bone Phosphate Of Lime (phosphate Content As Calcium Phosphate) |
| NLXC | Nonlocal Exchange Correlation (potential) |
| HEAL | Human Exposure Assessment Location |
| LVQ | Learning Vector Quantization |
| HHMI | Howard Hughes Medical Institute |
| IRC | Intrinsic Reaction Coordinate |
| PKS | Polyketide Synthase |
| SDTQ-MBPT | Single-double-triple-quadruple Excitation (contribution) MBPT |