| Acronym | Meaning |
| L2 | Square Integrable (wave Function) (in Electron-atom Or -mol. Collisions) |
| PCD | Polycrystalline Diamond |
| CRU | Constitutional Repeating Unit |
| NMPIMC | Normal Mode Path Integral Monte Carlo |
| FMO | Floating Molecular Orbital |
| DSC | Differential Scanning Calorimetry |
| BWPT | Brillouin-Wigner Perturbation Theory |
| GUVI | Global Ultraviolet Imager |
| HGMF | High Gradient Magnetic Filtration |
| EPOCA | Environmental Project On Central America |