| Acronym | Meaning |
| NEGF | Nonequilibrium Green Function |
| EAS | Extensive Air Shower |
| HMM | Hidden Markov Model |
| UA | Unequilibrated Aggregate (interplanetary Dust Particle) |
| SPPES | Spin Polarized Photoelectron Spectroscopy |
| UPD | Underpotential Deposition |
| IUMS | International Union Of Microbiological Societies |
| ISCRF | Inhomogeneous Self-consistent Reaction Field Theory |
| FSSW | Friction Super Stir Welding |
| BSRS | Backward Stimulated Raman Spectrometry |