I have read the changes in the available Preface PDF ([1]), and wondered about the authors using MacDraw Pro for creating illustrations. What does HN use? I us

I have read the changes in the available Preface PDF ([1]), and wondered about the authors using MacDraw Pro for creating illustrations. What does HN use? I used to create drawings using Visual Thought. Now for my technical TeX-documents I use InkScape. I would very well like to know if there are better tools out there... [1]: http://mitpress.mit.edu/books/chapters/0262033844pref1.pdf http://mitpress.mit.edu/books/chapters/0262033844pref1.pdf