| Acronym | Meaning |
| AIPM | Analytic Independent-particle Model (in Electron-scattering) |
| MFR | Melt Flow Ratio |
| RMC | Relativistic Multiconfiguration |
| IP | Impact Parameter Approximation |
| BLS | Brillouin Light Scattering |
| RSCA | Relativistic Semiclassical Approximation (for At. Scattering) |
| CAAT | Johns Hopkins Center For Alternatives To Animal Testing |
| LRCI | Low-rank Configuration Interaction |
| WRAQS | Western Regional Air Quality Study |
| NQI | Nuclear Quadrupole Interaction |