Computers are tools used to process the data according to the procedures that have been formulated. Computer word originally used to describe the work people do arithmetic calculations, with or without tools, but the meaning of this word and then transferred to the machine itself. Their origins, processing information almost exclusively related to arithmetical problems, but modern computers are used for many tasks unrelated to mathematics.

In such a definition is a tool like a slide rule, mechanical calculator types ranging from abacus, and so on, until all contemporary electronic computers. Better terms suitable for a broad sense such as "computer" is "that process information" or "information-processing system."

Over the years there have been several different meanings to the word "computer", and several different words are now referred to simply referred to as a computer.

The word computer is generally never used To define people who do arithmetic calculations, with or without a donkey engine. According to the Barnhart Concise Dictionary of Etymology, the word is used in English in 1646 as the word for "people who count" and then before 1897 is also used as a "mechanical calculators. During World War II, the word refers to female workers of the United States and England whose work calculating artillery war path with the cash register.