•   European Economic and Monetary Union (EMU) involves the coordination of economic and fiscal policies, a common monetary policy, and a common currency, the euro among Eurozone nations.

•   The decision to form the EMU was adopted by the European Council in the Dutch city of Maastricht in December 1991 and was later enshrined in the Treaty on European Union (the Maastricht Treaty).

Other currencies:

•   Guilder was the currency of the Netherlands from the17th century until 2002, when it was replaced by the euro.

•   Mark was a currency or unit of account in many nations. It is named for the mark unit of weight. As of 2018, the only circulating currency named "mark" is the Bosnia and Herzegovina convertible mark.

•   Dollar (symbol: $) is the name of currency of more than 20 currencies. They include Australian dollar, Canadian dollar, Hong Kong dollar, New Zealand dollar, Singapore dollar, New Taiwan dollar, Jamaican dollar, Liberian dollar, Namibian dollar, Brunei dollar, the United States dollar and several others.