Photographer unknown, 1984 – Source: Deutsches Museum
Konrad Zuse's greatest achievement was the Z3, world's first functional, fully automatic, program-controlled
and freely programmable computer.
The design of the Z3 was, in principle, Turing-complete.
The Z3 used 22-bit binary floating-point arithmetic and had a memory of 64 words.
Program code was stored on punched film.
The Z3 was completed in May 1941, but it was destroyed in a Berlin air raid in December 1943.
A fully functioning replica was built in 1961 and it is located in Deutsches Museum