| Acronym | Meaning |
| QCC | Quadrupole Coupling Constant |
| CBF | Cerebral Blood Flow |
| LDEF | Long Duration Exposure Facility (for Spacecraft Material Testing) |
| AEC | Acceptable Effluent Concentration |
| AAI | American Association Of Immunologists |
| HRADS | High Resolution Adsorption |
| FTMS | Fourier Transform Mass Spectrometry |
| PNO-CE | Pseudonatural Orbital-configuration Expansion |
| ALCA | American Leather Chemists' Association |
| JAK | Janus Kinase |