Which kind of organization is formed by a number of different countries

around specific national interests?

1.) NATO (North Atlantic Treaty Organization) - Their interests are to defend each other against communism

2.) WTO (World Trade Organization) - Their interests are to regulate trade

3.) United Nations - Their interests are keeping peace and security worldwide

International Organisations. Supranational Organisations.

Explanation:

Like World Health Organisation, United Nations, Council of Europe, International Police Organisation, and such more. Like World Trade Organisation, The European Union, World Bank, Inter-American Development Bank, and such more.

The difference between one another is that Supranational can have jurisdiction everywhere, it transcend borders. But, Intentional ones have jurisdiction outsides borders.