| Acronym | Meaning |
| DF | Density Functional Formalism |
| FSR | Free Spectral Range |
| AFFF | Aqueous Film-forming Foam |
| AIP | Arc Ion Plating |
| ELCAD | Electrolyte-cathode Discharge |
| NWIS | Nuclear Weapons Identification System |
| VD-RCC | Vibrational Diabatic-rotational Close-coupled (method In Mol. Collision Calcns.) |
| OWRS | Office Water Regulations And Standards (US EPA) |
| ADXPS | Angular Dependent X-ray Photoelectron Spectroscopy |
| RFE | Recursive Feature Elimination |