| Acronym | Meaning |
| NOAA | National Oceanic And Atmospheric Administration |
| ICRU | International Commission On Radiation Units And Measurements |
| USGS | United States Geological Survey |
| EPHMRA | European Pharmaceutical Market Research Association |
| FPC | Federal Power Commission |
| SWTR | Surface Water Treatment Rule |
| SPECM | Scanning Photoelectrochemical And Electrochemical Microscopy |
| CCI | Contracted Configuration Interaction |
| LPA | Local Plasma Approxn. (in Calcns. Of Stopping Powers For Ions By Films) |
| NRBC | Nucleated Red Blood Cells |