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Clickipedia
The first electronic computer ENIAC weighed more than 27 tons and took up
1800 square feet.
UNIVAC
UNIVAC or Universal Automatic Computer, was another successful invention of
John Mauchly and Presper Eckert in 1951, which could handle both numeric and
textual information. The UNIVAC had 5200 vacuum tubes.
UNIVAC
Features of First Generation Computer
Huge in size.
Very expensive.
Made up of vacuum tubes.
Vacuum tube
Second Generation (1950s)
After 1955, the use of transistors and magnetic
tapes changed the image of the electronic computer.
During this period, the major computer manufacturers
began to offer a range of accessories such as: Page
Printers, Cathode Ray-Tube display, Card Feeders,
Magnetic tape
etc. They were smaller, faster, more reliable, and more
energy-efficient.
Evolution of Computers 11

