For example, this is used to display syllabii and other documents that must be accessible prior to registering a name and password with the system. The link shown here passes the file that contains the syllabus for the TTEF course. The help utility works like the task utility and help files work like task files. The registration record of each person is an instance of the Person class. Each course is an instance of the Course class, and so forth.
Inheritance organizes such classes into hierarchies.
For example, Person and Course are both subclasses of Entity. This is in turn a subclass of Object which is the base class for all classes in the system. Since no funds were available to buy a commercial object-oriented database, the Object class provides methods whereby instances can maintain their state between sessions as unix files. This is hardly optimal for computer performance. Userland Frontier would have been better choice, had it been portable when this work began.