The Encyclopaedia Judaica is a 22-volume English-language encyclopedia of the Jewish people, Judaism, and Israel. It covers diverse areas of the Jewish world and civilization, including Jewish history of all eras, culture, holidays, language, scripture, and religious teachings. As of 2010, it had been published in two editions accompanied by a few revisions. The English-language Judaica was also published on CD-ROM. The CD-ROM version has been enhanced by at least 100,000 hyperlinks and several other features, including videos, slide shows, maps, music and Hebrew pronunciations. While the CD-ROM version is still available, the publisher has discontinued it. The encyclopedia was written by Israeli, American and European professional subject specialists. History Preceding attempts Between 1901 and 1906 The Jewish Encyclopedia had been published in 12 volumes. It was followed by the Jüdisches Lexikon I–II (1927–28, in German), Encyclopaedia Judaica I–II (1927–28) and Zsidó Lexikon (1929, edited by Ujvári Péter, in Hungarian). An unfinished German-language Encyclopaedia Judaica was published by Nahum Goldmann's Eshkol Publishing Society in Berlin 1928–1934. The chief editors were Jakob Klatzkin and Ismar Elbogen. Ten volumes from Aach to Lyra appeared before the project halted due to Nazi persecutions. Two Hebrew-language volumes A-Antipas, were also published under the title Eshkol (Hebrew: אשכול). A few of the articles from the German Judaica and even some of the reparations payments to Goldmann were used in making the English-language Judaica. First edition The English-language Encyclopaedia Judaica was first published from 1971–1972 in sixteen volumes, in Jerusalem by Keter Publishing House, and in New York City by the Macmillan Company. Between 1973 and 1991 eight "Yearbooks" were published (dated 1973, 1974, 1975–76, 1977–78, 1983–85, 1986–87, 1988–89, and 1990–91) along with two "Decennial" volumes dated 1973–1982 (also published as "Volume 17") and 1983–1992. Together these volumes contained more than 15 million words in over 25,000 articles. Its general editors were, successively, Cecil Roth and Geoffrey Wigoder. Advertisers describe it as the result of about three decades of study and research by about 2,200 contributors and 250 editors around the world. Contributors included Gershom Scholem. A Shorter Jewish Encyclopedia in Russian, launched in the early 1970s as an abridged translation of the Encyclopaedia Judaica, evolved into a largely independent publication that by late 2005 included eleven volumes and three supplements. A number of editions of a version of the English Encyclopaedia for youth were also published. Because of its comprehensive scope, authority, and widespread availability,