Discover Card
Dean Witter Reynolds was founded in 1978 as the merger of Dean Witter &amp; Co. and Reynolds Securities (with Dean Witter acquiring Reynolds), which was then the biggest merger in the history of Wall Street. The company was acquired by Sears in 1981, and was renamed "Dean Witter, Discover &amp; Co." in 1993 when Sears spun off the company. The company also owned Discover Card.