Punched cards have been used for centuries to aid automation. When I was in med school, at the University of Ottawa, I occasionally watched the engineering guys cursing their IBM, punch-card stacks, while I waited to meet my wife, who was in U of O’s nursing school.

It doesn’t feel like a long time but, computer history from punch cards to CP/M PCs to Macs and now to the iPad tells a longer story; from punch cards to iPad.

Observation: iPad users seldom curse.

What’s next?