11 май 1941 г. - Now working with limited backing from the DVL (German Aeronautical Research Institute),
Konrad Zuse completed the 'Z3' (originally 'V3'): the first operational programmable computer.
One major improvement over Charles Babbage's non-functional device is the use of Leibniz's
binary system (Babbage and others unsuccessfully tried to build decimal programmable computers).