WorldCat
The OCLC Union Catalog, containing millions of records for materials
in member libraries around the world. Updated daily.
List of periodicals held by OCLC member libraries.
CATNYP, the catalog of the Research Libraries; and LEO, the Branch Libraries catalog (Manhattan, Bronx, and Staten Island branches).
Brooklyn Public Library
The Brooklyn Public Library is separate and independent from the public library systems in the other boroughs of New York City.
Queens Borough Public Library
The Queens Borough Public Library is an autonomous library system, separate from library systems in the other boroughs of New York City.
Includes CLIO, the Columbia University Libraries main catalog (including the Avery Architectural Library); as well as catalogs for the Law School, Teachers College, and Union Theological Seminary libraries.
New York Academy of Medicine Library
One of the largest medical libraries in the United States. Open to the public.
The Library of Congress
From this page, you can access interfaces for simple and advanced keyword searching or phrase searching.
LibDex
A worldwide directory of library homepages, web-based OPACs, Friends of the Library pages, and library e-commerce affiliate links. Edited and compiled by Peter Scott.
Libweb: Library Servers via WWW
Contains links to libraries in over 70 countries. Part of the Berkeley Digital Library SunSITE project, sponsored by The Library, UC Berkeley and SUN Microsystems.