| Acronym | Meaning |
| IRZ | Immediate Response Zone |
| ECOP | Electron Correlation Polarization (potential) |
| NASC | North American Shale Composite |
| CCSC | Charge And Configuration Self-consistency |
| SRCD | Synchrotron Radiation Circular Dichroism |
| ESC | Endometrial Stromal Cell |
| NRTI | Nucleoside Reverse Transcriptase Inhibitor |
| CEPA-VAR | Coupled-electron-pair Approxn.-variational |
| RFT | Respirator Fit Test |
| AIM | Adiabatic Invariance Method (in Ion-mol. Reactions) |