World organizations include International Monetary Fund, World Wildlife Fund, World Health Organization, United Nations Children's Fund, UNESCO, etc.

1. International Monetary Fund: The International Monetary Fund was established in 1944 to promote world trade. Headquartered in Washington, DC, it is committed to improving the financial situation of its member countries.

2. World Wildlife Fund: Founded in 1961, WWF is the largest conservation organization in the world. The main purpose is to protect endangered animals and their living places.

3. World Health Organization: WHO is a part of the United Nations. Promote health affairs on a global scale, aiming at improving medical standards and monitoring diseases.

4. UNICEF: UNICEF was established in 1947. Committed to improving the health and welfare of children and mothers in developing countries.

5. UNESCO: UNESCO was founded in 1946. Encourage countries to unite on education, culture and science.