Game & Watch[a] is a series of handheld electronic games developed by Nintendo. Designed by Gunpei Yokoi, the first game, Ball was released in 1980 and the original production run of the devices continued until 1991. The name Game & Watch reflects their dual functionality: a single game paired with a digital clock on a segmented liquid-crystal display (LCD) screen. The Game & Watch series proved a monumental success, selling a total of 43.4 million units globally, marking Nintendo's first major worldwide success with a video game console.