WESCO International, Inc. is a holding company for WESCO Distribution, a multinational electronics distribution and services company based in Pittsburgh, Pennsylvania. Despite the 'international' moniker, the company makes "nearly all of its sales" in the United States. WESCO International, Inc. (NYSE: WCC), a publicly traded Fortune 500 holding company headquartered in Pittsburgh, Pennsylvania, is a provider of electrical, industrial, and communications maintenance, repair and operating ("MRO") and original equipment manufacturers ("OEM") product, construction materials, and advanced supply chain management and logistic services. 2012 annual sales were approximately $6.6 billion. The Company employs approximately 9,000 people, maintains relationships with over 18,000 suppliers, and serves over 100,000 customers worldwide. Customers include commercial and industrial businesses, contractors, government agencies, institutions, telecommunications providers and utilities. WESCO operates seven distribution centers and approximately 400 full-service branches in North America and international markets. In 1922, WESCO Distribution was formed as a subsidiary of the Westinghouse Electric Corporation also based in Pittsburgh. It had existed for decades within Westinghouse as the subsidiary charged with selling and distributing company components in the electrical and industrial fields. WESCO maintained close ties to its parent. In 1994, the private equity firm Clayton, Dubilier & Rice (CD&R) arranged for the purchase of WESCO from Westinghouse.