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1946年2月世界上第一个电子计算机ENIAC,像神话般地展现在人们面前。这一拥有17468个真空管和6000个开关、重30吨的庞然怪物,接通电源时美国费城的电灯一下子变暗了。 ENIAC是电子时代的骄子。它虽然比哈佛大学的Mark-Ⅰ机械式数字计算机晚两年面世,但计算速度却比Mark-Ⅰ快1000倍。它可以用2.8毫秒完成乘法运算,用24毫秒完成除法运算。在此之前,为了进行弹道计算,一个熟练专家使用手摇计算机,需要花20小时。就是用当时最精巧的电子机械式模拟计算机也叫微分分析机,也需要花20分钟。可是使用ENIAC只要花30秒钟。约翰·莫库林和普雷斯帕·埃加托是制造ENIAC和揭开计算机时代帷幕的发明家。
February 1946 The world’s first electronic computer ENIAC, like a fabulous show in front of people. This has 17,468 vacuum tubes and 6,000 switches, weighs 30 tons of monster monster, when the power is turned on, the lights of Philadelphia, the United States suddenly dimmed. ENIAC is the pride of the electronic age. Although it is available two years later than the Mark-I mechanical digital computer from Harvard University, its computational speed is 1000 times faster than Mark-Ⅰ. It takes 2.8 milliseconds to complete the multiplication and 24 milliseconds to complete the division. Prior to that, a skilled expert used a hand-cranked computer for ballistic calculations, which took 20 hours. It is using the most sophisticated electronic mechanical simulation computer, also known as differential analysis machine, also takes about 20 minutes. However, it takes only 30 seconds to use ENIAC. John Mauchling and Prespa igato are inventors who made ENIAC and opened the curtain of the computer age.