Question: what are the different generations of computer?
Answer: 1940 – 1956: First Generation – Vacuum Tubes. These early computers used vacuum tubes as circuitry and magnetic drums for memory. ... 
1956 – 1963: Second Generation – Transistors. ... 
1964 – 1971: Third Generation – Integrated Circuits. ... 
1972 – 2010: Fourth Generation – Microprocessors.