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computer:

A computer is a machine that stores large amounts of information and recalls the information quickly when it is needed. It can also do speedy calculations and combine facts in different ways. Every computer has three main ways of working. It can take information, called input, from outside itself. It can work on that information by following a set of instructions called a program. It can show, display, or store results called output. A tiny computer today is more powerful than the room-sized computers that were used by large businesses just a few decades ago. Modern computers are usually linked to other computers around the world through the Internet. As powerful as modern computers are today, there are many things that a computer still cannot do. It cannot make moral judgments about what’s right and what’s wrong. A computer does not experience emotions such as love, pity, or happiness. Some things can be done better by computers. Other things can be done better by people. People who use computers can take advantage of the large amount of information a computer makes available to them while using their own judgment about the best way to apply it.