WMS Industries, Inc. is an American electronic gaming and amusement company with development facilities and main headquarters in Las Vegas, Nevada. The company's main operating subsidiaries are WMS Gaming and Williams Interactive. WMS traces its roots to 1943, to the Williams Manufacturing Company, founded by Harry E. Williams. However, the company that is known today as WMS Industries was formally founded in 1974 as Williams Electronics, Inc. In 2013, it became a wholly owned subsidiary of Scientific Games.