Discover Financial Services, Inc. is an American financial services company that owns and operates Discover Bank, an online bank that offers checking and savings accounts, personal loans, home equity loans, and credit cards. It also owns and operates the Discover and Pulse networks, and owns Diners Club International. Discover Card is the third largest credit card brand in the United States, when measured by cards in force, with nearly 50 million cardholders. Discover is currently headquartered in the Chicago suburb of Riverwoods, Illinois. Wikipedia