The North Atlantic Treaty Organization (NATO) is NOT part of the United Nations. It is a military alliance made up of the U.S., Canada, and ten Western European nations. The General Assembly, Security Council, and Secretary General are part of the United Nations.
The United Nations Organization (UN).
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World Health Organization
UN is the Peacekeeping Organization abbreviation for the United Nations.
UN
The "Leaque of Nations", established in the Versailles Treaty of 1919/20, was replaced by the UN in 1945 after WWII ended in Europe.
The United Nations, UN, is an international organization. The organization has assisted globally to curb hunger, improve drinking water, and assist refugees.
NATO's assignment is protection of the North Atlantic (Treaty Organization) countries.
Do you mean which countries are not part of the UN?
The UN.
UN(United Nations)
Though not exactly the same the League of Nations was a precursor to the UN.