THE CENTER PROCESSING UNIT ],CALLED A MICROPROCESSOR IS THE BRAIN OF COMPUTER.ITS JOB IS TO CARRY OUT COMMANDS.WHENEVER YOU PRESS A KEY CLICK THE SENDING INSTRUCTIONS TO THE CPU.LOCATED INSIDE THE COMPUTER CASE,THIS SILICON CHIP IS ABOUT THE SIZE OF A FINGERNEIL THE MICROPROCESSOR DETERMINES HOW FAST A MICROPROCESSOR'S SPEED IS MEASURED IN MEGAHERTZ OR MILLIN OF MSTRUCTIONS PER SCOND SO THE HIGHER THE MEGAHERTZ THE FASTER THE COMPUTER CAN PROCESS INSTRUCTIONS.
INTEL CYRIX AND AMD ARE THE THREE MAIN CPU MANUFACTURES FOP PCs.THE POWER PC MICROPROCESSOR,DEVELOPED BY APPLE,MOTOROLA AND IBM,IS USED IN MACINTOSH PERSONAL COMPUTERS