A microprocessor is a silicon chip that contains a CPU, or central processing unit, which is normally located on the main circuit board in a computer. (In the world of personal computers, the terms microprocessor and CPU are often used interchangeably.) These chips, or integrated circuits, are small, thin pieces of silicon onto which the transistors making up the microprocessor have been etched. The computer industry has continued rapid growth, mainly thanks to the increased performance and speed of advanced microprocessors. The microprocessor is the heart of the “average” computer, from personal computers (desktops and laptop machines) and tablets to larger servers. They also have many uses; for example, they control the logic of almost all familiar digital devices— from microwaves and clock radios to fuel-injection systems for automobiles