Not really a question - “just” a comment :smiley:

I am thoroughly impressed by this chapter and by Cocoa. With very little code I have mad a small to-do list application even with a delete button, save/open functionality, and it’s document based to boot.

I am thinking about how one would do something similar in Java or MFC, or even Winforms, and Cocoa - in this regard at least - impresses hugely.