any machine designed to carry out calculations, esp. for the mechanical performance of arithmetical operations.

The proprietary name of a calculating-machine. Also attributive.

Electronics and Computing. A unit for producing the difference of two input quantities, typically electronic or electromechanical; spec. a digital…

An electronic device for performing calculations, now esp. one that is preprogrammed; spec. (more fully pocket calculator) a flat hand-held…

A programmable calculator or hand-held computer.