The systems use the term item as a generic reference to an object or selection in the navigation tree. Items in the All Items navigation tree include the site, devices, control systems (logic), graphics, objects, integrations, schedules, files, trend studies, field points, user-defined navigation trees, and other system data. Each item can have another item under it, and so on as the system hierarchy continues. Items have right-click pop-up menus that provide commanding and viewing options. A symbol represents each item in the navigation tree, and status symbols indicate the status of each item.