The Zuse Z23 was a transistorized computer first delivered in 1961, designed by the

Zuse KG Konrad Ernst Otto Zuse (; 22 June 1910 – 18 December 1995) was a German civil engineer, pioneering computer scientist, inventor and businessman. His greatest achievement was the world's first programmable computer; the functional program-c ...

company. A total of 98 units were sold to commercial and academic customers up until 1967. It had a 40-bit word length and used an 8192 word drum memory as main storage, with 256 words of rapid-access ferrite memory. It operated on fixed and floating-point binary numbers. Fixed-point addition took 0.3 milliseconds, a fixed point multiplication took 10.3 milliseconds. It was similar in internal design to the earlier vacuum tube Z22. Related variants were the Z25 and Z26 models. The Z23 used about 2700 transistors and 7700 diodes. Memory was magnetic-core memory. The Z23 had an

Algol 60 ALGOL 60 (short for ''Algorithmic Language 1960'') is a member of the ALGOL family of computer programming languages. It followed on from ALGOL 58 which had introduced code blocks and the begin and end pairs for delimiting them, representing a k ...

compiler. It had a basic clock speed of 150 kHz and consumed about 4000 watts of electric power. An improved version Z23V was released in 1965, with expanded memory and a higher processing speed. The Z23 weighed about .

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External links

Z23 Crosses Atlantic

Computer History Museum Zuse Z23
Transistorized computers Konrad Zuse Computers designed in Germany Computer-related introductions in 1961 {{compu-stub