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TUI AG, together with its subsidiaries, provides tourism services worldwide. It operates hotels and resorts under the Robinson, Riu, TUI Blue, Blue Diamond, TUI Suneo, and TUI Magic Life brands. The company is also involved in the tour operation and airlines businesses. In addition, it operates cruise liners under the Mein Schiff, Hapag-Lloyd Cruises, and Marella brands. The company operates 1,600 travel agencies and online portals; 134 aircraft; and 16 cruise liners, as well as 418 hotels. The company was formerly known as Preussag AG and changed its name to TUI AG in June 2002. TUI AG is headquartered in Hanover, Germany.