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He developed a partly electronic engine.
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He published a paper on the usa of a universal formal language.
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He developed the concepe of a theoretrical computing machine.
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Creates the Z1 computer binary digital computer using punch tape
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Develops the complex number calculator
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They designed the MARK series of computers at Havard University
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John Presper Ecker & John W, Mauchly Developed the ENIAC (Electronic Numeral Intergator and Computer).
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He developed his cathody-ray tube (CRT) storing devices the forerunner to random-acces memory (RAM)
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Donald Watts Davis joins Alan Turing to build the fastest digital computer in England at the time, the Pilot ACE.
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He events Magnetic drum memory.