| Acronym | Meaning |
| PEM | Parametric Equations Of Motion |
| SSED | Solar System Exploration Division (NASA) |
| NLLSF | Non-linear Least Square Fitting |
| SESMO | Semiempirical Scaled Molecular Orbital |
| UMO | Unmodified Molecular Orbital |
| BOCV | Biorthogonality Constrained Variation Method |
| ATERIS | Air Toxics Exposure And Risk Information System |
| NCWQ | National Commission On Water Quality |
| EAM | Energy Absorbing Molecules |
| LUCO | Lowest Unoccupied Crystal Orbital |