| Acronym | Meaning |
| NSTA | National Science Teachers Association |
| IGT | Institute Of Gas Technology |
| NL-SCF | Nonlocal (density Functional)-self-consistent Field |
| GIAO | Gage Invariant Atomic Orbital |
| ROBO | Rotating Bond Order (model In Potential Surface Calcns.) |
| FEES | Field Electron Energy Spectroscopy |
| SECS | Simulation And Evaluation Of Chemical Synthesis |
| CCDW | Coupled-channel Distorted-wave (quantum Method) |
| PNDO | Partial Neglect Of Differential Overlap |
| TGMA | Task Group Of Metal Accumulation |