ORGANIZING BUREAU OF EUROPEAN SCHOOL STUDENT UNIONSNGO·BRUXELLES, BelgiumESC accreditataNon reclamato
OSMANİYE BİRLİK GENÇLİK VE SPOR KULÜBÜ DERNEĞİNon-profit/Non-Governmental Organisation·OSMANİYE, TurkeyNon reclamato
OSMEH-Organization for Solidarity, Mobility, Ecology and Humanity of youthNon-profit/Non-Governmental Organisation·Belgrade, SerbiaNon reclamato
OSTERREICHISCHES ROTES KREUZ LANDESVERBAND OBEROSTERREICH VEREINNGO·LINZ, AustriaESC accreditataNon reclamato
