Answer :

rishabh5301M

Answer:

  1. 1940 – 1956: First Generation – Vacuum Tubes. These early computers used vacuum tubes as circuitry and magnetic drums for memory. ...
  2. 1956 – 1963: Second Generation – Transistors. ...
  3. 1964 – 1971: Third Generation – Integrated Circuits. ...
  4. 1972 – 2010: Fourth Generation – Microprocessors

Explanation:

there are 4 generations ok

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