Konrad Zuse's Z-1(1935) a relay computer, using binary arithmetic 北京大学计算机科学技术系 计算机系统结构教研室
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Aiken's Model-K(1937) Howard Aiken at harvard University whose work would come to fruition in 1944. and George Stibitz at bell Telephone laboratories who was looking at the use of telephone relays in doing arithmetic. He first constructed a relay driven arithmetic unit in 1937(which he later called the Model-k since it was built on the Kitchen table)and from that small start built a number of relay machines that were in use during World War II 北京大学计算机科学技术系 计算机系统结构教研室
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1936-39 Atanasoff/Berry Computer (ABc) Scientific American august 1988 Special purpose pp. 90-96: Dr. Atanasoff's Computer solving simultaneous equations Electronic digital computation Electronic switching Separate memory Memory regeneration Binary number system Vector processing Clocked control Capacitor-drum memories 北京大学计算机科学技术系 计算机系统结构教研室
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Atanasoff/Berry Computer(ABC) 北京大学计算机科学技术系 计算机系统结构教研室
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Colossus.Mark I (1943) 北京大学计算机科学技术系 计算机系统结构教研室
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