The ITB Berlin (Internationale Tourismus-Börse Berlin) is the world's largest tourism trade fair. The companies represented at the fair include hotels, tourist boards, tour operators, system providers, airlines and car rental companies.
ITB Berlin (or just ITB) has been running since 1966. The ITB Berlin takes place annually in March at the Messe Berlin. The fair always has an official partner country, in 2018 (March 7-11) represented by the German state of Mecklenburg-Vorpommern.
In 2012, about 7,000 journalists attended the ITB Berlin, of whom about 1,500 came from abroad. In addition to the industry's leading trade magazines, business and travel journalists from 94 countries also report on the latest travel trends and products. 11,000 exhibitors from 180 countries welcomed 170,000 visitors, among these, 113,000 were trade visitors.
According to en.wikipedia