This was an update of the previous edition because of the many changes that had been made in the intervening months. They went at a torrid pace for a few years

This was an update of the previous edition because of the many changes that had been made in the intervening months. They went at a torrid pace for a few years there. It's amazing how much they got so right in design philosophy. And of course I'm a huge fan of the readability of their documentation. All documentation should be this good.