[{"Bold_text": "noun", "List Items": ["an employee, often an officer, of a business firm who checks expenditures, finances, etc.; comptroller.", "a person who regulates, directs, or restrains.", "British Aeronautics.a dispatcher.", "a regulating mechanism; governor.", "Also called control unit control unit, processor .Computers.the key component of a device, as a terminal, printer, or external storage unit, that contains the circuitry necessary to interpret and execute instructions fed into the device.", "Digital Technology.a remote piece of hardware used to direct or control an electronic device:a video game controller."]}]