Citicorp Diners Club, Inc. provides card/payment solutions in the United States. It offers Purchasing Card, which helps organizations to streamline procurement and payment processes, and improve spending controls; Corporate Card System, which is an expense management solution for organizations; and Corporate Travel System, which helps organizations by providing consolidated billing and reconciliation for all air, rail, and common carrier charges. The company also provides the Diners Club Carte Blanche Corporate Card, a card program with privileges for executive-level employees; Group Event System, which is the corporate expense management product for group meetings and events; and Multinational Corporate Card, a global expense management solution designed for organizations spanning various countries. In addition, it offers online services, such as Commercial Electronic Reporting System, which provides online review and analysis of Purchasing Card charges; Corporate Account Manager, which is used by program managers for access to account management services; Global Card Management System, which is a Web-based reporting system; Global Vision, an online corporate MIS reporting tool; Online Expense Reports, which helps program managers to streamline expense reporting and improve back-office expense report administration; Online Statements, which allows users and their card members to access and view account details online; and T+E Reconciler, which is used to identify discrepancies, calculate payment, and electronically transmit funds. Citicorp Diners Club provides personal cards, such as charge cards to customers internationally. It serves businesses and institutions, including companies and global corporations, consulting and accounting firms, colleges and universities, and state and local governments. The company is headquartered in Chicago, Illinois. Citicorp Diners Club, Inc. operates as a subsidiary of Citibank N.A.