Development of punched cards by Herman Hollerith and James Powers in 1890.

Jonh P Eckert and Jonh W Mauchly build a speed electronic computer known as ENIAC.

ENIAC used 18, 000 vacuum tubes, about 1,800 square feet of floor space, and consumed about 180,000 watts of electrical power. It had punched card 1/0, 1 multiplier, 1 divider/square rooter, and 20 adder using decimal ring counters.

ENIAC is accepted as the first high-speed electronical digital computer

Fascinated by the success of ENIAC, Von Neumann made a special type of machine instruction called Conditional control transfer- which allowed the program sequence to be stopped and started again at any point.

1947 First generation of modern program electronic computers (EDVAC and UNIVAC the first commercially available computers.

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