1960s: Term Geographic Information Systems developed
1969: Environmental Systems Research Institute (Esri) founded
1992: ESRI releases ArcView, the first desktop GIS software
Early-Mid 2000's: Major online mapping/routing sites emerge (MapQuest, MapBlast, etc.)
2004: Google acquired Keyhole
2005: Hurricane Katrina aerial images and api capabilities
04/2010: ArcGIS.com Released in Beta