A calculator (in the current usage of the word) is an electronic hand-held device that performs mathematical computations. Calculator may also refer to: Calculator (software), a computer program that performs mathematical computations Calculator (Windows), a computer program in Microsoft Windows Calculator (Apple), a basic calculator application bundled with Apple devices Mechanical calculator, a calculating device used from the 1700s to the mid-1900s Mental calculator, a person who performs calculations in their head Calculator (character), DC Comics villain Oxford Calculators, a group of 14th-century philosophers Calculator (band), an American emo band Richard Swineshead, English mathematician whose popular name was Calculator