Invention of Microprocessor

Microprocessor was invented at Intel , In early 70's intel was developing a chip for use in digital calculator for a japanese company, soon intel realized that such a chip could be used independently for other applications also, they released the chip in market , it became very popular , that was "4004" , a 4 bit microprocessor , that means the biggest number it can handle ( for addition , substraction etc ) , is "15 " ,its frequency was in KiloHertz , that means it took milliseconds to execute an instruction compare it with todays microprocessors which are 64 bit capable and operate at Giga Hertz (nano seconds instruction timing). Microprocessor is a big milestone in science , because of microprocessor it is possible to get the computing power in Hand held size machines, it incorporates a complete processing unit, earlier computers used electromagnetic relays as basic memory unit , so they were huge ,they took space equivalent to a room ,and were slower than even low end processors of these days.When semiconductor was invented and IC technology came , the computers were made using digital logic IC's , that also took much space , microprocessor is a single ic , equivalent (or even powerful) to those processing units .It has everything inside , fabricated on a single peace of silicon , whose area is in millimeters , so now computer could be anywhere , inside a washing machine , a mobile phone , GPS machine , any machine can have a higher level of interactivity , programability , and accuracy .