The Common Market Initials are the abbreviations for three organizations that are related to the European Union. The first is EURO, which stands for the European Currency Unit and is a single currency used by many countries in the European Union. The second is ECU, which stands for the European Economic Community and is an organization of countries that work together to promote economic cooperation and development. The third is EEC, which stands for the European Economic Area and is an area of free trade between the European Union and other countries. These three organizations are important components of the European Union and have been instrumental in its development.