| Acronym | Meaning |
| HAN | Halogenated Acetonitrile(s) |
| TKN | Total Kjeldahl Nitrogen |
| IRZ | Immediate Response Zone |
| CISDTQ | Configuration Interaction With Single |
| ECAMSI | Electron Configuration Analysis For Many-system Interactions |
| MMC | Metal-Matrix Composite |
| FTICR | Fourier Transform Ion Cyclotron Resonance |
| ANA | Adiabatic Nuclei Approximation (in Electron-mol. Scattering) |
| BODC | Born-Oppenheimer Diagonal Correction (in Mol. Calcns.) |
| DAPS | Disappearance Potential Spectroscopy |