Different between 2 generation and 4 generation of computer

In the Second generation of Computers Transistors were used they were small in size cheaper then vacuum tubes and reliable plus they also generated lot of heat and there was a need of A/C required and also that they also consumed lot of Electricity. also Only Machine Language was used. time period (1959-1965)

4th generation of Computers Microprocessor was used which is used till now( present -day today)

.they were reilable

.cheap

.consumed less electricity

.small in size

. not generated lot heat

.no A/C required

. Assembly and machine language was used.