| Acronym | Meaning |
| ESMO | Excited-state Molecular Orbital |
| ECFP | Enhanced Cyan Fluorescent Protein |
| HGHR | Human Growth Hormone Receptor |
| INTEGRAL | International Gamma-Ray Astrophysics Laboratory |
| ANOSIM | Analysis Of Similarity |
| CBC | Circulating Bed Combustor (or Incinerator) |
| CSA | Centrifugal Sudden Approxn. (in Scattering Calcns.) |
| AVO | Average Virtual Orbital |
| GIAO | Gage-independent Atomic Orbital |
| CD | Centrifugal Decoupling Approximation (for Atom-mol.scattering) |