An Economic Union is not a type of international economic agreement, but rather the highest level of economic integration, involving a common currency, common economic policies, and free movement of goods, services, and labor.

The main goal of an FTA is to eliminate or reduce tariffs and other trade barriers, such as quotas, subsidies, and export taxes, in order to facilitate the free flow of goods and services between participating countries.

In a Customs Union, member countries share a common external tariff, meaning they apply the same tariffs on imports from non-member countries. They also have a common trade policy and can freely trade goods and services among themselves.

The European Union (EU) is an Economic Union, which is the highest level of economic integration. It involves a common currency (the Euro), common economic policies, free movement of goods, services, and labor, and harmonized regulations and standards.

The World Trade Organization (WTO) is an international organization that aims to promote free trade by enforcing trade agreements, resolving trade disputes, and promoting negotiations on trade liberalization.

The North American Free Trade Agreement (NAFTA) was replaced by the United States-Mexico-Canada Agreement (USMCA) in 2020.

The Trans-Pacific Partnership (TPP) is a trade agreement between 11 countries in the Asia-Pacific region, including Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, and Vietnam.

The Regional Comprehensive Economic Partnership (RCEP) is a trade agreement between 15 countries in the Asia-Pacific region, including Australia, Brunei, Cambodia, China, Indonesia, Japan, Laos, Malaysia, Myanmar, New Zealand, the Philippines, Singapore, South Korea, Thailand, and Vietnam.

The Generalized System of Preferences (GSP) is a trade program that grants preferential tariffs to developing countries, allowing them to export certain products to developed countries at lower or zero tariffs.

The Most-Favored-Nation (MFN) principle in international trade means that all countries must be treated equally in terms of trade. This means that a country cannot discriminate against imports from a particular country by imposing higher tariffs or other trade barriers.

The World Bank is an international financial institution that provides loans and grants to developing countries, promotes economic development, and coordinates economic policies among countries.

The International Monetary Fund (IMF) is an international financial institution that provides loans to countries facing financial difficulties, monitors the global economy, and promotes international monetary cooperation.

The Organization for Economic Cooperation and Development (OECD) is an intergovernmental economic organization that promotes economic growth and development, coordinates economic policies among member countries, and provides a forum for discussion on economic issues.

The United Nations Conference on Trade and Development (UNCTAD) is a United Nations body that promotes trade and development, provides technical assistance to developing countries, and coordinates economic policies among countries.