Class Functions and Class Objects
     Creating Instances
     Class Messages
     Comparing Classes
 Comparing Objects
 Constructor Messages and Methods
 Deferred Methods
 Error Reporting
 External Methods
 Inheriting from Nantucket's Classes
 Inspecting Objects in the Debugger
 Length of Variable Names
 Linking of Classes
 Null Methods
 Overlaying
 Predefined Messages
     . new
     . super
     . class
     . perform
     . classH
     . className
 Reference Objects