| Acronym | Meaning |
| PT-MVD | Perturbation Theory (with) Mass-velocity And Darwin (operators) |
| MPO | Modified Polarized Orbital |
| MQO | Measurement Quality Objective |
| GUGA | Graphical Unitary Group Approach |
| LFL | Lower Flammable Limit |
| DART | Developmental And Reproductive Toxicology Database (NLM) |
| NCE | New Chemical Entity |
| ASE | Augmented Secular Equation |
| SCALPEL | Scattering With Angular Limitation Projection Electron Lithography |
| MBT | Minimum [spark Advance For] Best Torque |