The document summarizes a technical workshop on the ArcGIS platform and web GIS. It outlines the evolution of GIS technology towards more integrated software and services. It then reviews the key components of the ArcGIS platform, including ArcGIS Desktop, ArcGIS Online, Portal for ArcGIS, and ArcGIS Server. It demonstrates how GIS data and resources can be centralized in a portal and accessed through web apps by users on desktops, web, and mobile devices. The workshop concludes with advice on implementing web GIS within an organization.