Here’s a humorous little story from Andy Hertzfeld, a member of Apple’s original Macintosh team. Bill Atkinson did some clever programming to draw circles and ovals quickly on a Mac. But Steve Jobs had something else in mind.
Bill fired up his demo and it quickly filled the Lisa screen with randomly-sized ovals, faster than you thought was possible. But something was bothering Steve Jobs. « Well, circles and ovals are good, but how about drawing rectangles with rounded corners? Can we do that now, too? »
Check It Out: That Time Steve Jobs Taught Bill Atkinson About Rounded Rectangles

folklore.org is great – I also have the print version of it, Revolution in the Valley.