The following are international organization except

A pressure group is not an international organization. In simple terms, a pressure group is a collection of individuals or organizations that come together to influence public policy or government decisions. They do this by advocating for specific causes and using tactics such as lobbying, public demonstrations, and media campaigns to get their message across. The other organizations listed are all international organizations, which are groups of countries that come together for a common purpose, such as promoting peace, cooperation, and development. The Organization of African Unity (OAU) was a regional organization focused on African nations, while the United Nations Organization (UNO) is a global organization with a broad mandate to promote peace, security, and human rights around the world. The Commonwealth of Nations is a political association of 54 countries, mostly former territories of the British Empire, that work together on issues of common interest such as trade, cultural exchange, and democracy.