| Acronym | Meaning |
| OBIC | Optical Beam Induced Current |
| ICU | Intensive Care Unit |
| RQCISD | (spin) Restricted QCISD |
| SOFIA | Stratospheric Observatory For Infrared Astronomy |
| PGP | Previous Glacial Period (glacial Maximum Of O18 Stage 6; Predates The LGM) |
| CCP | Capacitively Coupled Plasma |
| CNDO | Complete Neglect Of Differential Overlap |
| MBR | Membrane Bioreactor |
| EMAT | Electromagnetic-acoustic Transducers |
| QEL | Quantity Exclusion Limit |