First Generation (1942-1955)
The First generation computers were entirely electronic. They used. vacuum tubes to store instructions. Magnetic drums were used for memory. They were 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 often needed expansive air-conditioning? First generation computers relied on machine language (1s and 0s), the
lowest-level programming language understood by computers, to perfoer operations, and they could solve only one problem at a time. “
The UNIVAC 1, ENIAC and Mark I computers are examples of the first-generation computing devices. The UNIVAC was the first commerciaI electronic computer. This machine was developed specially for scientific and military purposes but it was dedicated to a business client, the US. Census Bureau in 1951.
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