Information Center Facility administrators and users can define and invoke up to three levels of application definitions. A system-wide level is supported for applications that are defined for an entire system. A group level is supported for user groups to create their own application definitions and to override system applications with definitions tailored to a particular group. A user (or private) level is supported for individual users to create their own application definitions and to override group and system application definitions. All levels can be implemented in the Application Manager definition dialogs and all levels can be active at invocation time. See .