This list depicts the membership of European countries in selected international organisations and treaties.
Classification of countries according to the United Nations:
Classification of countries according to the World Bank:
Classification of countries according to the IMF:
<sup>1</sup> These countries are currently not participating in the EU's single market (EEA), but the EU has common external Customs Union agreements with Turkey (EU-Turkey Customs Union in force since 1995), Andorra (since 1991) and San Marino (since 2002). Monaco participates in the EU customs union through its relationship with France; its ports are administered by the French. Vatican City has a customs union in effect with Italy.<br> <sup>2</sup> Andorra, Monaco, San Marino and Vatican City are not members of Schengen, but act as such via their open borders with Spain, France and Italy, respectively.<br> <sup>3</sup> Switzerland is not an official member of EEA but has bilateral agreements largely with the same content, making it virtually a member.<br> <sup>4</sup> Andorra, Monaco, San Marino and Vatican City are using the euro as their currency through a monetary agreement with the EU.<br> <sup>5</sup> Montenegro and Kosovo unilaterally adopted the euro as their currency and, therefore, have no issuing rights.<br> <sup>6</sup> Currency included in the ERM II mechanism.<br>