1.  First Generation of Computer –

Vacuum Tubes - 1940 -1956

2.  Second Generation of Computer –

Transistor - 1956-1964

3.  Third Generation of Computer –

Integrated Circuits – 1965-1971

4.  Fourth Generation of Computer –

Microprocessor 1971 to till now……

5.  Fifth Generation of Computer –

Artificial Intelligence – Under Construction