Ah, I was confused, but now understand. The Computer History Museum has a Difference Engine which calculates polynomials. The Analytical Engine has an ALU and c

Ah, I was confused, but now understand. The Computer History Museum has a Difference Engine which calculates polynomials. The Analytical Engine has an ALU and control flow, and is Turing-complete. The first Turing-complete device, in fact. http://www.computerhistory.org/babbage/ http://www.computerhistory.org/babbage/ http://en.wikipedia.org/wiki/Difference_engine http://en.wikipedia.org/wiki/Difference_engine http://en.wikipedia.org/wiki/Analytical_Engine http://en.wikipedia.org/wiki/Analytical_Engine Best of luck to jgc!