| Acronym | Meaning |
| PCO | Perturbational Crystal Orbital |
| TIRF | Total Internal Reflectance Fluorescence |
| CPMP | Committee For Proprietary Medical Products |
| RFT | Respirator Fit Test |
| CHESS | Cornell High-Energy Synchrotron Source |
| RDS | Reflectance-difference Spectroscopy |
| MSC | Molecular Simulated Crystal Method (in Compton Profile Calcns.) |
| MPR | Maximum Permissible Risk |
| RACI | Royal Australian Chem. Institute |
| CGCC | Coal Gasification/combined Cycle |