Main memory = Magnetic Drums
External storage = Punched cards
Input Output Devices = Punched cards and papers
Languages = Low level machine language,
Operating system = No operating system, human operators to set switches
Size = Main frame for example ENIAC, EDVAC, UNIVAC
The duration lasted from 1946 - 1959 was based on vacuum tubes. These vacuum tubes were about the size of 100 watt light bulb and used as the internal computer component. However because thousands of such bulbs were used the computers were very large and generate a large amount of heat, causing many problems in temperature regulation and climate control.
In this generation input and out put device (punched card) chat were used for data storing purpose were very very slow. The computer were operate manually and the language used was a low level machine language (symbolic language) with binary code that required a high programming skill. ENJAC, EDVAC, UNIVAC AND MARK 1 were some of the major inventions of this generation.
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