| Acronym | Meaning |
| DO | Diatomic Orbital |
| CEOOWG | Commercial Earth And Ocean Observations Working Group |
| PNO | Pseudonatural Orbital |
| HDC | Histidine Decarboxylase |
| PCPI | Permanent Committee On Patent Information |
| SMS | Single Molecule Spectroscopy |
| RTO | Rapid Thermal Oxidation |
| ECSTM | Electrochemical Scanning Tunneling Microscopy |
| AGB | Asymptotic Giant Branch (stars) |
| ECMCAD | Extracellular Matrix And Cell Adhesion Molecule |