controller

/kənˈtɹəʊlə/noun

A person or device that directs or manages something.

Example sentences

“Air traffic controllers guide planes safely on and off the runway.”
“He bought a second controller so his friend could play too.”

Most often heard now for the handheld device used to play video games; in business it is also a senior accounting job title.

Related words

consoleA control panel with displays and input controls used to operate and monitor an electronic system.joystickA control device with an upright handle on a base, often fitted with buttons, used to steer aircraft, play video games, or operate machinery.modemA device that converts computer data into signals that can travel over a telephone line, and back again, so computers can connect to each other.earbudsTiny earphones that sit inside the ear, used for listening to music or calls from portable devices.adapterA device that lets two pieces of equipment work together when they would not otherwise connect.speakerA device that turns electronic signals into sound, used with phones, computers, and music systems.