| Acronym | Meaning |
 | IPNO | Independent-pair Natural Orbital |
| BSO | Brueckner Spin Orbitals |
| NIEL | Non-ionizing Energy Loss |
| NCAT | National Catalog Database (accessible Through OLS) |
| WBEPM | Weakest Bound Electron Potential Model (theory In Calcns. Of Ionization Potentials) |
| MCE | Multichannel Eikonal (method For Scattering Calcns.) |
| GEIA | Global Emissions Inventory Assessment |
| SGTF | Spherical Gaussian-type Function |
| PNO | Pseudonatural Orbital |
| DOI | Department Of The Interior |
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