| Acronym | Meaning |
| HRS | Hyper-Rayleigh Scattering |
| CEES | Committee On Earth And Environment Sciences (US) |
| BAC-MP4 | Bond-additivity-corrected Moeller-Plesset 4th-order Perturbation |
| PERI | Pharmaceutical Education And Research Institute |
| CCR | Complex Coordinate Rotation (method For Calcns. Of Resonances In Scattering) |
| IQG | Independent Quasigeminals |
| MTJ | Magnetic Tunnel Junction |
| CDW | Coulomb Distorted Wave (for Scattering Calcns.) |
| PFZ | Polar Frontal Zone |
| QAMS | Quality Assurance Management Staff (US EPA) |