1945, the first fully automatic electronic digital computer "ENIAC" was produced in the United States (abbreviated as ENIAC in English, which means electronic digital integrator and calculator in Chinese). It was developed by Oberdin weapon test range in the United States to meet the needs of trajectory calculation. The main inventors are eckert, an electrical engineer, and Dr. Mochili, a physicist. This computer 1946 was delivered in February and served for 9 years. It uses electron tubes as the basic components of the computer, and can add and subtract 5000 times per second. It uses18,000 lamps,10,000 capacitors and 7,000 resistors, with a volume of 3,000 cubic feet, an area of 170 square meters, a weight of 30 tons and a power consumption of 140 ~ 150 kilowatts. It is a veritable "monster".
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