The first computers used vacuum tubes for electronic equipment and magnetic drums for memory, and were typically huge, absorbing entire rooms. These computers were terribly pricy to control and additionally to employing a quite a little of electricity, the primary computers generated plenty of warmth, that was typically the explanation for malfunctions.
First generation computers relied on machine language, the lowest-level programing language understood by computers, to perform operations, and that they might solely solve one drawback at a time. it’d take operators days or maybe weeks to set-up a brand new drawback. Input was supported punched cards and paper, and output was displayed on printouts.
The UNIVAC and ENIAC computers ar samples of first-generation computing devices. The UNIVAC was the primary industrial laptop delivered to a business shopper, the U.S. office in 1951.

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