But [Z→Z] has a different approach: dissecting MacPaint, the Apple drawing program from the 1980s. While the program looks antiquated by today’s standards, it was pretty hot stuff back in the day.

Imagine if you were one of the original engineers for Apple’s Macintosh. Somewhere in your attic was a box stuffed with the original floppy disks for MacPaint. Andy Hertzfeld happened to have an idea: ...