Z4 (computer)
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The Z4 was arguably the world's first commercial digital computer, and is the oldest surviving programmable computer. It was designed, and manufactured by early computer scientist Konrad Zuse's compan
Z4 on display at the Deutsches Museum, Munich
Electromagnetic relay of the Z4
Z22 (computer)
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The Z22 was the seventh computer model Konrad Zuse developed. One of the early commercial computers, the Z22's design was finished about 1955. The major version jump from Z11 to Z22 was due to the use
Z22, built 1956; now at ZKM in Karlsruhe
ZUSE Z22 single-tube logic module
Programming the Z22