We live in an age of computers. Businesses, government agencies, and other organizations use computers and related technologies to handle tedious paperwork, provide better service to customers, and assist managers in making good decisions. Individuals use computers for such activities as paying bills, shopping, managing investments, preparing their taxes, playing games, researching products, communicating with others, and exchanging electronic photos and greeting cards. Because of their growing prominence in our society, it is essential to know something about computers and how they are used today.