The microfiche edition Jewish Biographical Archive (JBA) contains biographical articles from 102 reference books amounting to 164 volumes, starting with the end of the 18th century up to the foundation of the state of Israel in 1948.For this Archive the most varied sources like encyclopedias, manuals, calendars, almanacs and Who's whos have been cumulated to render a comprehensive picture of the international role played by Jews in religion, culture, economics, science and politics. Alongside articles on Jews and Jewish Apostates, there are also on a small scale biographies of non-Jews who have either a positively or a negatively pre-eminent connection to Jewry.The 690 microfiches of the Jewish Biographical Archive present themselves as a small world archive in its own right, because the selection of biographies listed was not limited by national or geographic boundaries. The Archive contains influential Jewish personalities from all around the world from biblical times onwards up to the middle of the 20th century.In its four alphabetically arranged volumes, the Jewish Biographical Index gives access to the c. 65,000 individuals and about 96,000 biographical articles which are listed in the Archive.On the one hand, the Jewish Biographical Index serves as a register to the Jewish Biographical Archive. It gives a condensed overview of individuals listed in JBA and greatly aids search in the Archive, for the Index does not only specify every individual's name with his/her biographical dates and profession, but also gives references as to where the entries are to be found on microfiche plus the abbreviated titles of the biographical sources used.On the other hand, as a work in its own right, the Index presents a highly valuable tool for biographical research by showing the way to the original source and by offering information which leads to an immediate identification of the person in question as well as his/her historical classification.The JBI is the first index that provides in its appendix a name index according to occupation groups. Within these occupation groups entries are listed alphabetically by names. The user will also find in the appendix an index of family entries contained in the JBI.The Jewish Biographical Index presents itself as an important reference work in two respects: It allows its user direct access to the original work in printed form as well as to the microfiches of the Jewish Biographical Archive and provides in short important biographical information.