Contains catalog records for books, serials, newspapers, music scores, sound recordings, microforms, maps, computer files, archives and manuscripts, videorecordings, and other visual materials added to the Columbia University Libraries since 1981, including some material acquired before that date. Also contains records for the U.S. Government Documents collection in Lehman Library.

Borrow Direct is a rapid delivery service that allows patrons from participating libraries to check the availability of and request books from the combined catalogs of Harvard, Princeton, Dartmouth, Cornell, Columbia, Penn, Brown, University of Chicago, and MIT.

Contains over 48 million records, covering all materials cataloged by OCLC member libraries around the world.

Searchable and browsable database of dissertations and theses from around the world, spanning from 1743 to the present day. It also offers full text for graduate works added since 1997, along with selected full text for works written prior to 1997. It contains a significant amount of new international dissertations and theses both in citations and in full text. Designated as an official offsite repository for the U.S. Library of Congress, PQDT Global offers comprehensive historic and ongoing coverage for North American works and significant and growing international coverage from a multiyear program of expanding partnerships with international universities and national associations.