The Microprocessor brought the fourth generation of computers,as thousand of integrated circuits were built onto a single silicon chip.What in the first generation filled an entire room could now fit in the palm of hand. The Intel 4004 chip,developed in 1971,located all the components of the computer from the central processing unit and memory to input/output controls on a single chip. In 1981 IBM introduced its first computer for the home user Macintosh. Microprocessors also moved out the realm of desktop computers and into many areas of life as more and more everyday products began to use Microprocessors .As these small computers became more powerful,they could be linked together to form networks,which eventually led to the development of the Internet.Fourth Generation computers also saw of development of GUIS,the mouse and handheld devices.