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What is a computer?

A computer is a machine that can store and process information. Most computers rely on a binary system that uses two variables, 0 and 1, to complete tasks such as storing data, calculating algorithms, and displaying information. Computers come in many different shapes and sizes, from handheld smartphones to supercomputers weighing more than 300 tons. (source)

A computer is a programmable device that stores, retrieves, and processes data. … The term was later given to a mechanical device as they began replacing the human computers. Today’s computers are electronic devices that accept data (input), process that data, produce output, and store (storage) the results. (source)

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