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A computer is a programmable machine designed to automatically carry out a sequence of arithmetic or logical operations. The first use of the word "computer" was recorded in 1613, referring to a person who carried out calculations, or computations, and the word continued with the same meaning until the middle of the 20th century.

From the end of the 19th century the word began to take on its more familiar meaning, a machine that carries out computations.

In the beginning, computers were as big as a large room. It is only later that they have become smaller and smaller, accessible to anyone. This has given way to personal computers. Later developers created new applications to help users perform many things.