| Acronym | Meaning |
| SDO | Shielded Diatomic Orbital |
| CRMMA | Chemical Reference Material Manufacturers Association |
| ICC | Interstate Commerce Commission |
| ERIN | Environmental Resources Information Network |
| MOPA | Master Oscillator Power Amplifier |
| BIB | Blocked Impurity Band |
| PQL | Practical Quantitation Levels (of Pollutants |
| GUVI | Global Ultraviolet Imager |
| MAGE | Melanoma-associated Antigen-encoding Gene |
| ESTN | Electron Spin Transient Nutation |