| Acronym | Meaning |
| CAFE | Corporate Average Fuel Economy |
| IVC | Inferior Vena Cava |
| WDA | Weighted-density Approxn. (within D. Functional Formalism) |
| ADR | Adverse Drug Reaction |
| LTER | Long Term Ecological Research |
| SRCI | Single-reference Configuration Interaction |
| NODP | National Oceanic And Deposition Program |
| IDA | Interdigitated Array (microelectrodes) |
| LENA | Low-energy Neutral Atom |
| IEL | Independent Electron (model In Ion-impact Ionization Calcns.) |