A computer is a programmable machine that receives input, stores and manipulates data, and provides output in a useful format. While a computer can, in theory, be made out of almost anything and mechanical examples of computers have existed through much of recorded human history, the first electronic computers were developed in the mid-20th century (1940–1945). Originally, they were the size of a large room, consuming as much power as several hundred modern personal computers (PCs). Modern computers based on integrated circuits are millions to billions of times more capable than the early machines, and occupy a fraction of the space. Simple computers are small enough to fit into mobile devices, and can be powered by a small battery. Personal computers in their various forms are icons of the Information Age and are what most people think of as “computers“. However, the embedded computers found in many devices from MP3 players to fighter aircraft and from toys to industrial robots are the most numerous.
Uses of Computers
· People use computers in many ways. Stores use computers to keep track of products and Animator at Work.
· Computers are an important part of many people’s daily lives. Kids use computers to play games and to learn in school. Adults use them at home and in all kinds of work.
· Check you out at the cash register. Banks use computers to send money all over the world.
· Computers help teachers keep track of lessons and grades. They help students do research and learn. Computers let you hook up to networks (many computers hooked together). They let you hook up to a worldwide network called the Internet.
· Scientists use computers to solve research problems. Engineers use computers to make cars, trucks, and airplanes. Architects use computers to design houses and other buildings. The police use computers to track down criminals. The military uses computers to make and read coded messages.
Computers need hardware and software in order to work. Desktop or laptop and all the parts inside are called hardware. The central processing unit (CPU) makes the computer work. The keyboard, mouse, printer, Scanner, Joystick, andmonitor are also pieces of computer hardware. Memory chips are hardware that stores information and instructions. Information also gets stored on the hard disk drive.