The European Single Market, Internal Market or Common Market is a single market which seeks to guarantee the free movement of goods, capital, services, and labour – the "four freedoms" – within the European Union (EU). The market encompasses the EU's 28 member states, and has been extended, with exceptions, to Iceland, Liechtenstein and Norway through the Agreement on the European Economic Area and to Switzerland through bilateral treaties. Through the Deep and Comprehensive Free Trade Area (DCFTA), three post-Soviet countries Georgia, Moldova and Ukraine were given access to the Single Market in selected sectors. Turkey has access to the free movement of goods via its membership in the European Union Customs Union.