On a computer that is running access 2488 (1945) 2501 (1958) vacuum tubes, which use high power. So the problem with heat and frequent lack of tube filling. Although there is a very good cooling system. The command language, which is a numeric code that simplifies complex. In this era of big size, such as mark day (MARK I), e-AC (ENIAC), uni waek (UNIVAC)
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