| Acronym | Meaning |
| RREL | Risk Reduction Engineering Laboratory |
| PBP | Penicillin Binding Protein |
| VOIP | Valence Orbital Ionization Potential |
| CCA | Coupled-cluster Approach |
| SS | Suspended Solids |
| SO-LAPW | Spin-orbit (coupling) Linearized Augmented Plane Wave |
| DIS | Deep Inelastic Scattering |
| GMDH | Group Method Of Data Handling |
| WMT | Warped Muffin-tin Approximation |
| LTU | Land Treatment Unit |