ArcGIS.com is a website for working with maps and other types of geographic information. Visit the site to create maps; find and use maps, applications, and tools; and share your maps and applications with others. Within the site, you will find applications for building and sharing maps. You will also find useful basemaps, data, applications, and tools that you can view and use, plus communities you can join. ArcGIS Online is Esri's repository of maps, data, applications, and tools. ArcGIS Online includes content from Esri, its partners, and the GIS community at large. Anyone can share maps and data via ArcGIS Online. The ArcGIS.com website lets you access all the content in ArcGIS Online using a web browser. ArcGIS.com is just one way to work with ArcGIS Online. If you are using an Esri product such as ArcGIS Desktop (starting at version 10) or ArcGIS Explorer Desktop, you can view ArcGIS.com web maps, download layer packages, and access ArcGIS Online using commands inside those applications..