The Index is an online research tool maintained by the Saul Lieberman Institute of Talmudic Research that provides references and citations to over 1,200 academic works relating to passages found in the Talmud and other ancient rabbinic literature. By searching for a specific Talmudic passage, the Index returns a list of relevant sources and the page numbers where those texts discuss that passage. This allows researchers to quickly locate scholarly discussions of Talmudic passages and brings Talmudic research into line with modern bibliographic standards.