Bret Victor takes you to 1973 to deliver a presentation on an overhead projector about the future of programming. He shows the latest innovations from the 60's and 70's and how they will change the future of computing.

'The most dangerous thought that you can have as a creative person is to think that you know what you're doing, because once you think you know what you're doing you stop looking around for other ways of doing things and you stop being able to see other ways of doing things. You become blind. I think you have to say: "We don't know what programming is. We don't know what computing is. We don't even know what a computer is." And once you truly understand that, and once you truly believe that, then you're free, and you can think anything.'

A beautiful presentation about innovation.