Tutorial on the Web:
For QGIS
http://manual.linfiniti.com/en/index.html-- QGIS Manual
http://qgis.spatialthoughts.com/-- some steps for geoprocessing http://hub.qgis.org/projects/quantum-gis/wiki/How_do_I_do_that_in_QGIS -- simple steps for geoprocessing For SQL, Python, and Javascript
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Finding Data:
Census Fact Finder
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