Madrid hosts the seat of international organizations such as the United Nations' World Tourism Organization (UNWTO), the Ibero-American General Secretariat (SEGIB), the Organization of Ibero-American States (OEI), the  (OIJ), the  (OISS), the International Organization of Securities Commissions (IOSCO), the Club of Madrid and the International Commission for the Conservation of Atlantic Tunas (ICCAT)