Fun thing to build if you've gotta few million $$ lying around
Apparently, former Microsoft CTO Nathan Myhrvold commissioned the building of a Difference Engine a few years ago, originally designed by Charles Babbage in the 1840s but too large and costly to build in its day. The Difference Engine is a massive mechanical calculator with much greater capabilities than the simpler machines of its day. It’s the second of 2 such machines ever to be built, is eleven feet long, seven feet high and weighs five tons. I wonder if he keeps it in his living room.
The first Difference Engine ever built was completed in 1991 by the London Science Museum and is currently being moved to go on display next month in San Francisco.