When I create a custom Class it is a subclass of NSObject. Where NSObject is the Superclass of my new class. This I get. When I add an NSButton or NSWindow do I say "Mybutton is a subclass of of some greater class?" is that why I see subclass everywhere when they talk about buttons, windows and everything else? I knew it applied to Classes but every object has that same relationship? I simply was saying I drag a NSButton out of the library and stick it in/on my NSWindow". Is the proper way to say it "I subclass'd an NSButton"?