| Acronym | Meaning |
| LRTI | Lower Respiratory Tract Infection |
| RBR | Reductive Burning Recovery |
| MGMS | Molecular Graphics And Modelling Society |
| CDA | Cosmic Dust Analyzer |
| PCM | Polarizable Continuum Model |
| RHFT | Relativistic Hartree-Fock Two-channel (for Scattering) |
| CDT | Critical Dissolution Time (synthetic Fiber And Polymer Property) |
| SEM | Strategic Environmental Management |
| EFA | Envelope Function (i.e. |
| CNDO/SWW | Complete Neglect Of Differential Overlap/ Sichel-Whitehead-Wratten Parametrization |