Vienna is currently the most populous. The capital of Austria is also one of nine federal states – the smallest, but the most populous. He lives here almost 1/5 the entire population of the country. The city is home to global institutions, m.in. Organization of Petroleum Exporting Countries (OPEC) and the United Nations International Atomic Energy Agency. Advantageous location and easy access make it, that many international companies have their headquarters here. Vienna is famous for the production of clothing, electronic equipment, paper, chemicals and beer. Industry is concentrated here: machine, electrotechnical, precise, petrochemical, paper, printing, wood and porcelain.