Computer generations classified into five types

Timeline of Computers

  • 1st generation of computer

    1st generation of computer
    The first generation of computer was used between 1942 - 1946. The computers of first generation used vacuum tubes as the basic components for memory and circuitry for CPU (Central Processing Unit). Charles Baggage and J.W. Mauchy invented the first successful electronic computer called ENIAC, ENIAC stands for “Electronic Numeric Integrated And Calculator”.
  • 2nd generation of computer

    2nd generation of computer
    The second generation was used from 1956-1963. In this generation, transistors were used that were cheaper, consumed less power, more compact in size, more reliable and faster than the first generation machines made of vacuum tubes. It was invented by John Bardeen, William B. Shockley, and Walter H.
  • 3rd generation of computer

    3rd generation of computer
    The 3rd generation of computer used Integrated Circuits (ICs) in place of transistors. 1 IC has many transistors, resistors, and capacitors along with the associated circuitry. It was invented by Jack Kilbly, and was used between 1964 - 1971.
  • 4th generation of computer

    4th generation of computer
    The period of fourth generation was from 1976-1999. It used Very Large Scale Integrated (VLSI) circuits. VLSI circuits having about 5000 transistors and other circuit elements with their associated circuits on a single chip made it possible to have microcomputers of fourth generation. It was invented by Intel
  • 5th generation of computer

    5th generation of computer
    In 2000, Japan was invented the FGCS (Fifth Generation Computer System). Computers of this generation are based on microelectronic technology with high computing power and parallel processing. This is the most recent and technologically advanced computer generation.