after the science museum in london successfully built the computing section of charles babbage's difference engine #2 in 1991, myhrvold funded the construction of the output section, which performs both printing and stereotyping of calculated results. he also commissioned the construction of a second complete difference engine #2 for himself, which was on display at the computer history museum in mountain view, california, from may 10, 2008 to january 31, 2016 and currently resides in the intellectual ventures laboratory.