computer

(now rare, chiefly historical) A person employed to perform computations; one who computes.

Hyponym: computress

(by restriction, chiefly historical) A male computer, where the female computer is called a computress.

A programmable electronic device that performs mathematical calculations and logical operations, especially one that can process, store and retrieve large amounts of data very quickly; now especially, a small one for personal or home use employed for manipulating text or graphics, accessing the Internet, or playing games or media.