ArcGIS Desktop is a collection of GIS software that is built to run on standard desktop (or laptop) computers. Probably the most visible programs within ArcGIS Desktop are ArcMap and ArcCatalog, but there are a variety of other programs and extensions included. ArcGIS Desktop provides all the tools needed to perform extensive GIS functions, from creating maps to importing, querying, and editing data. ArcView, ArcEditor, and ArcInfo refer to three different levels of licensing for the ArcGIS Desktop suite. ArcView is the most basic level, but it provides a fairly complete set of features for simple mapping projects. ArcView was also the name of an early version of ESRI GIS software. ArcEditor provides many advanced functions and is available for installation on a laptop or personal computer that is not connected to the WU network. ArcInfo is the full function licensing of ArcGIS Desktop and is available for installation on computers connected to the WU network. For a complete comparison