HaHistadrut HaKlalit shel HaOvdim B'Eretz Yisrael (General Federation of Laborers in the Land of Israel)

Commonly known as Histadrut. Founded in 1920, this national- level organization was also the nation’s largest single employer after the government. Histadrut performs many economic and welfare services in addition to trade union activities; leadership of Histadrut has generally been drawn from the Labor Party and its predecessors.

Source: Library of Congress