Generations of Computers

The evolution of computer started from 16th century and resulted in today‟s modern machines. The present day computer, however, has also undergone rapid change over the years. This period, during which the evolution of computer took place, can be divided into five distinct phases known as Generations of Computers. Each new generation of computers is not only superior from their predecessor in processing and capabilities but also differs in looks and sizes. Each phase is distinguished from others on the basis of the type of switching circuits used. These Generations are:

• First Generation Computers (1940-1956)
• Second Generation Computers (1956-1963)
• Third Generation Computers (1964-1971)
• Fourth Generation Computers (1971-Present)
• Fifth Generation Computers (Present and Beyond)