| Acronym | Meaning |
 | QRM | Quadratic Rubinow Method (variational Method For Scattering) |
| PGA | Prostaglandin A |
| SPPES | Spin Polarized Photoelectron Spectroscopy |
| QHA | Quasi-harmonic Approxn. (in Intramol. Vibrational Relaxation) |
| ONR | Office Of Naval Research |
| EIP | Economic Incentive Program |
| CBS-FCI | Complete Basis Set-full Configuration Interaction |
| OBK | Oppenheimer-Brinkman-Kramers (approxn. In Atom-ion Electron-exchange Calcns.) |
| WEF | Water Environment Federation (formerly WPCF) |
| NLDA | Nonlocal Density Approxn. |
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