Brief Description: Minutes of the Organizing Committee. By-laws. Convention materials, 1921-1932: reports, minutes, list of delgates. Reports of the Executive Board, 1922-1933. Editorial files of the publications *Teater yedies* and *Teater byuletin*. Correspondence with the committee to publish the *Leksikon fun yidishn teater* (Lexicon of the Yiddish Theater) edited by Zalmen Zylbercweig. Arbitration court for disputes among members. Plan to construct a building for the union's headquarters. Statistics about working and unemployed actors. Correspondence of the Executive Board. General correspondence. Correspondence with government agencies, with the Federation of Writers and Composers of the Polish Stage "ZAIKS", with the International Federation of Theatrical Employees. Correspondence with theater ensembles in Argentina, U.S., France, Latvia and England. Correspondence with local groups in Warsaw, Vilna, Lublin, Lwow, Cracow, Lodz. About 600 individual files on actors, singers, composers, directors, including Misha Alexandrovitch, Paul Baratov, Diana Blumenfeld, Moses Broderson, Shaine Miriam Broderson, Mendl Elkin, Dina Halpern, Rachel Holzer, Ida Kaminska, Esther Rachel Kaminska, Abraham Morewski, Lidia Potocka, Ajzyk Samberg, Maurice Schwartz, Zygmunt Turkow, Jonas Turkow, Michael Weichert, Rudolf Zaslavsky.