pipZuseZ3

An emulator for the Zuse Z3 computer, invented in 1941 by Konrad Zuse.

It was the world's first working programmable, fully automatic digital computer. The Z3 was built with 2,600 relays, implementing a 22-bit word length that operated at a clock frequency of about 5–10 Hz. Program code was stored on punched film. Initial values were entered manually.