A microprocessor is a circuit that contains the arithmetic, logic and control circuits the computer needs to interpret and carry out instructions contained in a computer program. The microprocessor is combined with other microprocessors on a semiconductor base to form a computer chip. Then the microprocessor becomes the heart of your PC, also called a microcomputer. Calculators, digital watches and electronic games also contain microprocessors. Your mom's kitchen appliances or your house's alarm system may also have microprocessors.
Computers become even more powerful when they are connected through a network.
Two or more computers are linked to exchange messages or share information or system resources. The Internet is a wide-area network. It connects millions of people through their computers throughout the world.