Yesterday marked 40 years since Doug Engelbart demonstrated the first computer mouse in San Francisco.

This far-thinking innovator also showed teleconferencing, online collaboration, realtime text editing and hypertext links during the same demonstration.
The computer mouse was a wooden block, measuring about five inches square.
Back in November 1968, Engelbart worked at the Stanford Research Institute and was working on his vision of what the computer could be and how people could interact with it.
It took another 15 years after that demonstration before Apple incorporated a mouse into the Lisa computer, forerunner to the Macintosh.