calculator TechTarget Contributor 1) Calculators: A calculator is a device that performs arithmetic computations on numbers. The simple calculators can be used for addition, subtraction, multiplication, and division. Advanced calculators are capable of handling exponential operations, roots as well as logarithm s, trigonometric calculations, and hyperbolic functions. Internally, some calculators actually complete all of these functions by repeating the process of adding. A majority of calculators these nowadays require electricity to run. Portable, battery-powered calculators are popular among Engineering students and engineers. Before 1970 a more primitive model of calculator known as the slide rule, was popularly used. It consisted of a slat of wood, referred to as the slide, which could be moved into and out by a reinforced pair slats. Both the slide and the other pair of slats came with calibrated scales for numerical values. A movable, transparent piece of...
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