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The Austrian Trade Union Federation or Austrian Federation of Trade Unions (de: Österreichischer Gewerkschaftsbund, abbreviated OeGB or ÖGB) is a labour union of employees. It is constituted as an association and is subdivided into seven smaller affiliated trade unions. Each union is traditionally dominated by a certain political faction, with the strongest faction in the ÖGB as a whole traditionally being the social democratic one, which is known for its close contacts to Austria's Social Democratic Party (SPÖ); in fact, chairmen of the ÖGB have often also been influential SPÖ members.