• Aleph: Jewish Theological Seminary catalog
• Archival Collections Portal
• CLIO: Columbia's online catalog
• CLIO Legacy
• CLIO Classic
• Course Reserves
• CU Spatial Data Catalog (GeoData@Columbia)
  
• CU Numeric Data Catalog
• Educat: Teachers College catalog
• Pegasus: Law Library catalog

An expansive list of library catalogs selected by Columbia University librarians.

• Arcade: A shared catalog of the Frick Art Reference Library and the libraries of the Brooklyn Museum and The Museum of Modern Art
• City University of New York
• Metropolitan Museum
• MoMA: Museum of Modern Art
• New York University
• New York Public Library

• WorldCat: Search the collections of more than 10,000 libraries worldwide
• Center for Research Libraries: Find primary sources, and rare materials
  
• U.S. National & Federal Libraries
• Library of Congress
• The Digital Public Library of America (DPLA)
  
• The European Library
• National Libraries of the World
• KVK - Karlsruhe Virtual Catalog (Karlsruhe Virtueller Katalog): Global search of e-texts across an international range of library catalogs and other databases.