History of computers

By Gladis Alicia Zelaya Rivera

  • Herman Hollerith

    an American inventor, built a machine to count a census. It used punched cards and gears like the previous ones, but it worked with electricity. His company grew to become the first computer manufacturer in the world: IBM.

  • The first computer called ENIAC

    is introduced to the public. It was built at the University of Pennsylvania (USA) and operated with more than 17,000 vacuum tubes. It could make 5,000 additions and 300 multiplications per second.

  • The second generation of computers starts

    which used transistors to process information instead of vacuum tubes. New programming languages such as COBOL and FORTRAN were developed.

  • Integrated circuits begin to be used in the computers

    which increased the processing capacity and reduced the size of the machines.

  • The microprocessor appears

    a single integrated circuit in which the basic elements of the computer meet. The first personal computers begin to develop.

  • Steve Jobs and Steve Wozniak make the Apple I

    This computer allowed users to see what they were doing on a screen, unlike other models. Then an improved version called Apple II came, which sold millions of units.