An IVR tree, or Interactive Voice Response Tree, is typically used by automated answering systems to direct calls to the correct party. This particular example is for a car dealership to route calls.

This Interactive Voice Response Tree (IVR tree) has nodes that contain a collapsible list of actions, controlled by a PanelExpanderButton, with a TreeExpanderButton underneath the body. See the Intro page on Buttons for more GoJS button information.