| Acronym | Meaning |
| GIF | Graphic Image Format |
| GCA | Generator Coordinate Approxn. |
| REPELS | Reemitted Positron Energy Loss Spectroscopy |
| ADP | Auger Depth Profiling |
| CMO | Complex Molecular Orbital Method |
| DID | Dipole-induced-dipole (in Mol. Polarizabilities Calcn.) |
| RAL | Recommended Allowable Limit |
| FCHF | Frozen-core Hartree-Fock |
| EGR | Exhaust Gas Recirculation |
| DCRF | Die Casting Research Foundation |