-
-
used vacuum tubes
were very large expensive and required huge amount of electricity -
-
used transistors instead of vacuum tubes
faster and cheaper -
-
an integrated circuit (ID)is a small as a transistor but it can work as thousands of them
integrated circuits made computers fasters cheapers and smaller
they use less electricity and made fewer mistakes -
-
Use microprocessors
Are smaller portable and cheaper
they use less electricity and produce less heat -
-
Are the most advanced computers
Scienntists are now trying to develop fifth.generation computers. This is called artificial intelligence (AI)
