This week, Ron Avitzur visited Google for a tech talk to tell us about the origins of Graphing Calculator 1.0, the math application he developed, and that Apple bundled with the very first PowerPC computers more than a decade ago.

It's a fascinating, humorously-told story of two software engineers who evaded Apple's building security and worked without pay for several months to deliver something that they were passionate about. Definitely a story you should read and enjoy.

What's really cool is that even today, about 20 years later, Ron continues to work on Graphing Calculator full-time, adding new features, fixing bugs, and taking advantage of new advances in technology. :)