Agenda items 5.2, 51 and 43: General review of the programmes and activities in the economic, social, technical cooperation and related fields of the United Nations, the specialized agencies, the International Atomic Energy Agency, the United Nations Children's Fund and all other institutions and agencies related to the United Nations system : Review and reappraisal of the role and functions of the Economic and Social Council : report of the Secretary-General : Decentralization of the economic and social activities of the United Nations.