Resources:
U.S. Geological Survey
USGS is a world leader in the natural sciences. They provide scientific information on transportation, natural resources, geology, weather and topography.
http://www.usgs.gov/
ESRI
Offers free software, online mapping and GIS training, demos, data, product and service information, user scripts, and related information. Makers of ArcView, ArcGIS and ArcIMS.
http://www.esri.com/
GIS.com
Provides introductory overviews on many aspects of GIS. Find information about industries, curriculums and current events in GIS.
http://www.gis.com/
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