Early digital computers were electromechanical; electric switches drove mechanical relays to perform the calculation. These devices had a low operating speed and were eventually superseded by much faster all-electric computers, originally using vacuum tubes. The Z2, created by German engineer <answer>Konrad Zuse</answer> in 1939, was one of the earliest examples of an electromechanical relay computer.
Who created the relay computer, the Z2?
Konrad Zuse