EJView has numerous uses. People who are not familiar with geographic information systems can use it to quickly map common census data variables by block, block group, and tract, although not all variables can be mapped for each area type. It is much easier to use than the Census Bureau’s American FactFinder http://factfinder2.census.gov/ (CH, Jul’11, 48-6035) because EJView presents users with a selection of data that can be quickly mapped. In addition, data is normalized, so users see population density and the percent of people in a data class rather than the raw numbers that FactFinder displays. One can also quickly zoom in and out to view the regional picture. There is one disadvantage to the system: underlying features on the Bing base map, such as roads and parks, are obscured when demographic data are mapped. However, this is an easily used mapping system that will be valuable for a wide audience. Summing Up: Essential. All library collections.