Babbage Difference Engine No. 2 On Display Answered
"Charles Babbage (1791-1871), computer pioneer, designed the first automatic computing engines. He invented computers but failed to build them. The first complete Babbage Engine was completed in London in 2002, 153 years after it was designed. Difference Engine No. 2, built faithfully to the original drawings, consists of 8,000 parts, weighs five tons, and measures 11 feet long.
An identical Engine completed in March 2008 is on display at the Computer History Museum in Mountain View, California until May 2009." - http://www.computerhistory.org/babbage/