Established in 1940, Dairy Queen is one of the largest fast food systems in the world. Based in Fort Morgan, Colo., the company has more than 5,900 restaurants in the United States, Canada and 20 foreign countries. Dairy Queen's menu contains cheeseburgers, hot dogs, chicken wraps, regular French fries, onion rings, side salads, medium drinks, small sundaes as well as soft cones. In 1998, Berkshire Hathaway Inc. acquired International Dairy Queen Inc. and its subsidiary companies.