Building upon the previous seminar, this presentation will focus on how the ArcGIS system and developer APIs are uniquely poised for building systems for understanding the Operating Environment. Developers, program managers, and product managers new to ArcGIS will learn how ArcGIS is an open system that provides a geospatial infrastructure and APIs which can be used to build a digital twin of the operating environment. The seminar will include success stories and demonstrations of use cases including intelligence preparation for operations, integrating with game engines for decision support, and using GIS for operations and situational awareness.