Gaming and Williams Interactive, are also known as WMS. They were founded in 1943 by Harry Williams. The company started with the creation of pinball machines! In the early 1990s they started making slot machines with their games found all over the world in land-based casinos. In 2013, WMS became a wholly owned subsidiary of Scientific Games, which also owns other slot providers such as Bally, Barcrest and NextGen Gaming.