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Originally named the V1, the Z1 began development in 1936 by Germany's Konrad Zuse in his parents' living room and is considered the first electro-mechanical binary programmable computer. The Z1 had 64-word memory (each word contained 22 bits) and a clock speed of 1 Hz. Both programming and output were generated using punch tape with a specific reader. Below is a picture taken in 1937 of the Z1 computer.

Z1 computer

Also see: Computer history