| Acronym | Meaning |
| AED | Auger Electron Diffraction |
| MPT | Mitochondrial Permeability Transition |
| AMO MT | Alternant Molecular Orbital Matsubara-Toyozawa Method |
| CCD | Chemical Composition Distribution [of Polymers] |
| ICRF | Ion Cyclotron Range Of Frequencies |
| QDO | Quantum-defect Orbital (theory) |
| HEN | High-efficiency Nebulizer |
| BEW | Base (or Biological) Equivalent Weight |
| BOTDA | Brillouin Optical Time Domain Analysis |
| IOC | Intergovernmental Oceanographic Commission |