Many of the maps seen on the internet are using their webserver software. Articles by end users on GIS and problem solving. GIS World is the industry standard in publishing information on GIS products, services and reviews. This gains access to full-text articles from GIS World , Business Geographics , and several of their sister publications. Despite its name, this is a very comprehensive listing of GIS information available on the internet.
Categories are useful and breadth gives a nice sampling.
The major courier delivery companies have paired it with GIS to provide city navigation onboard map and routing systems. GPS was originally designed for U.S. Military application but has been widely adapted by surveyors, boaters and hikers as a means of navigation. This is a good place to start. This is the next place to start. The Coast Guard found GPS very useful for Buoy and other Navigational aid placement.