This is the collection of data available through the ARDA (association of religion data archives) website.
amateur radio, shortwave listening, vintage radio, WiFi radio, AM/FM/TV broadcasting, longwave listening, scanner listening, DXing, radios, scanners, ham radio
suny conference agenda
demographics, U.S. Census, leads in to market segmentation and clustering, business site analysis by ZIP code assignment
A free web-based open-source GIS “textbook” available to anyone interested in using mapping tools to create maps.