Hannover Fairgrounds, Hannover, Germany. The 2009 Hannover Messe comprises 13 trade shows: INTERKAMA; Factory Automation; Industrial Building Automation; MDA - Motion, Drive & Automation; Digital Factory; Subcontracting; Energy; Wind; Power Plant Technology; ComVac; Surface Technology; MicroTechnology; and Research & Technology. This is the first year the event includes Wind fair, and it is set to take place every two years. About 2,000 congresses, discussion forums, seminars and workshops take place, including a World Energy dialogue, which will focus on sustainable future energy supplies.