| Acronym | Meaning |
| PTV | Particle-tracking Velocimetry |
| CLS | Characteristic Loss Spectroscopy |
| VCM | Variational Cellular Method (for Electronic Structure Calcns.) |
| CERPIES | Collision Energy Resolved Penning Ionization Electron Spectra |
| IF DRM | Inversion-free Direct Recursion Method (for Surface Electronic Structure) |
| BLC | BACT/LAER Clearinghouse |
| MIP | Microwave Induced Plasma |
| TACT | Trans Alaska Crustal Transect |
| QHA | Quasi-harmonic Approxn. (in Intramol. Vibrational Relaxation) |
| SOMO | Singly Occupied Molecular Orbital |