| Acronym | Meaning |
| ITD | Ion Trap Detector (mass Spectrometry) |
| IPNSO | Independent-pair Natural Spin Orbital |
| ISLAR | International Symposium On Laboratory Automation And Robotics |
| LRMS | Low Resolution Mass Spectrometry |
| CAPCA | Closure And Postclosure Activity |
| FSH | Follicle-stimulating Hormone |
| GTO | Gaussian-type Orbital |
| SCS | Semiclassical Coupled-states |
| ACC | Antarctic Circumpolar Current |
| MAAC | Maximum Ambient Air Concentration |