Last updated at 2:52 am UTC on 4 November 2006
The sole instance of this class SystemDictionary is the global variable Smalltalk.
SystemDictionary is a subclass of the class IdentityDictionary and behaves almost exactly the way other dictionaries do, but lots of useful methods are defined in SystemDictionary and can thus be invoked by executing a statment like in Recipe: How to list all global variables.
Where did the name Smalltalk come from?
You can register a class with SystemDictionary>>addToStartUpList:. This
class must provide a method named startUp.