App are self contained modules and only loaded if it was purchased. Apps are typically purchased in sets of 5.
Tags offer flexibility of grouping resources. Files, Assets, Systems, Plans are some examples that can be tagged.
Assets app is core application. All other apps are linked to an Asset.
System and Assets app shows all the details about the specific system or the specific asset respectively. Other apps show details of all assets accessible to the user
Users have Roles, Roles have permissions (Create, Read, Update, Delete) for each App.