This U-Tube Video is a must watch for any Vintage Computing Enthusiast

Quote from the Videos Description.

'"A simplified version of Charles Babbage's Difference Engine no. 2 has been constructed by Piers Plummer as part of a project with the Computer Science Department at Royal Holloway University of London, funded by The Leverhulme Foundation. In this video, it is performing calculations while being powered by steam!""

Charles Babbage designed one of the first computers but never lived to see it built. Here's a demo of one of the two in the world that work. This one is at the Computer History Museum in Mountain View, California, USA, and here they fire it up (well, crank it up) and explain a bit about it.