calculator TechTarget Contributor 1) 1) A calculator is an instrument which performs arithmetic functions on numbers. The simple calculators can perform addition, subtraction, and division. Advanced calculators are capable of handling exponential operations, roots, logarithm s, trigonometric functions, as well as hyperbolic functions. Internally, certain calculators actually complete all of these functions by repeating the process of adding. A majority of calculators these are powered by power to function. Batteries are portable and portable calculators are popular with Engineering students and engineers. Before 1970 a more basic version of calculator, the slide rule , was often employed. It consisted of a slat of wood, also known as the slide, which could be moved in and out of a reinforced pair slats. Both the slide and the outer pair of slats came with calibrated numerical scales. A movable, transparent sleeve called the cursor was used to align numerals ont...
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