| Acronym | Meaning |
| CPI | Chemical Process Industry |
| ISEA | International Society For Exposure Analysis |
| PIS | Penning Ionization Spectroscopy |
| ECM | Embedded Cluster Method (in Electronic-structure Calcns.) |
| UTL | Upper Tolerance Limit |
| CV | Calibrated Volume |
| DNAA | Delayed Neutron Activation Analysis |
| LPA | Lysophosphatidic Acid |
| AFV | Alternatively Fueled Vehicle |
| RISA | Radioimmunosorbent Assay |