ArcGIS is an integrated collection of GIS software products for building a complete Geographic Information System (GIS). ArcGIS enables users to deploy GIS functionality wherever it is needed for desktops, servers, or custom applications; over the web; or in the field.
"Make and share beautiful maps, and do everything in between. It's possible only with ArcGIS Online, a scalable and secure software-as-a-service hosted by Esri." http:www.arcgis.com/features/
For more educational information, visit Huxley's GIS & RS Software page.