Computer Generation
1st Generation (1940-1956)-Vacuum Tubes
The first computer used Vacuum Tubes for circuitry and magnetic drums for memory, and was often enormous, taking up entire rooms. They were very expensive to operate and in addition to using a great deal of electricity, generated a lot of heat, which was often the cause of malfunctions. First generation computer relived on machine language to perform operations, and they could only solve one problem at a time. Input was based on punched cards and paper tape, and output was displayed on printouts.
The UNIAC (UNIVersal Automatic Computer) and ENIAC (Electronic Numerical Integrator And Computer) computers are examples of first-generation computing devices. The UNIVAC was the first commercial computer delivered to a business client, the U.S. Census Bureau in 1951.
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