TUI AG (TUI) is an international tour operator. The company manages such hotel and resort brands as Robinson, Riu, TUI Blue, Blue Diamond and TUI Magic Life. It also participates in various tour operation and air transportation. TUI AG also possesses cruise ships. The company manages 1600 travel agencies and websites, 6 airlines, approximately150 aeroplanes, 16 cruise ships and around 380 hotels. The company was previously called Preussag AG before changing its name to TUI AG in June 2002. It's headquartered in Hannover, Germany.