Joust is an action game developed by Williams Electronics and released in arcades in 1982. While not the first two-player cooperative video game, Joust's success and polished implementation popularized the concept. Players assume the role of knights armed with lances and mounted on large birds, who must fly around the screen and defeat enemy knights riding buzzards.

WMS Industries, Inc. was an American electronic gaming and amusement manufacturer in Enterprise, Nevada. It was merged into Scientific Games in 2016. WMS's predecessor was the Williams Manufacturing Company, founded in 1943 by Harry E. Williams. However, the company that became WMS Industries was formally founded in 1974 as Williams Electronics, Inc.