Charles Petzold

Computer of the Tides
Lord Kelvin's Machine to Disprove Evolution

From the clash of thermodynamics, geology, and evolution, the era of analog computing was born.

57 minutes.

When Worlds Collide
Analog vs. Digital

We live in a universe whose natural processes are analog; yet we choose to model those processes on digital computers. Does this make sense? If digital technologies are so great, why do we increasingly hide digital computation under fluid and bouncy user interfaces? If analog computers are so lame, why are they also so clever, so elegant, and so fascinating?

56 minutes.