The part of a computer that interprets and executes instructions.
The part of a computer that controls its overall activity, as by executing instructions and performing logical operations.
The part of a computer that interprets and carries out instructions provided by the software. It tests and manipulates data, and transfers information to and from other components, such as the working memory, disk drive, monitor, and keyboard. The central processing units of personal computers are generally implemented on a single chip, called a microprocessor .