According to Wired –

In autumn of 1840, Charles Babbage arrived in Turin for a meeting of Italian scientists, where he gave the only public explanation of the workings of his “Analytical Engine.” This machine was the mostly-imaginary upgrade of Babbage’s failed “Difference Engine.” At the Accademia della Scienze di Torino (which was once run by Babbage’s host in Turin, Prof. 62 more words