A collection of organizations. Each instance of world organization is an organization with international `scope' -- that is, one which has substantial operations, physical facilities, or substantial membership in multiple countries. International organizations may have persons, other organizations, or countries as members. They may be political or commercial in nature. International organizations with countries as members belong to the specialization organization of countries. Instances of world organization include the United Nations, OPEC, and International Business Machines. See also International Organization Member Countries.