Multilingual database of international standard book numbers. Offers the possibility to investigate by category.

World index of library sites with over 18,000 database entries. Includes a list of libraries by catalog vendor.

Searchable directory for libraries worldwide sorted by category. Includes links to libraries of secondary schools, universities and other tertiary institutions.

Site offers data and facts on public libraries in the United States.

Searchable and categorized links to over 6,000 pages from libraries in over 100 countries, including academic, public and national libraries worldwide; library organizations and consortia; and related sites.

Searchable database of over 5,000 library sites worldwide. Listings include mailing addresses and links to online catalogs.

Index of libraries with detailed descriptions about the handling of the search interfaces sorted by countries.

Searchable directory of over 8,000 library and library-related sites worldwide arranged by countries. Includes a US section sorted by states.

IFLA list of world wide web accessible libraries worldwide sorted by countries.

Guide to veterinary medicine libraries worldwide sorted by countries.

Worldwide directory of school library sites. The US categories also list related library organizations.

Alphabetically arranged index of library resources including public, research and state libraries as well as national archives.

Links to national, academic and public libraries and their catalogues. Compiled by Sylvia Milne, a retired librarian.

A list of directories provided by the U.S. Library of Congress, National Library Service for the Blind and Physically Handicapped.

Searchable directory of academic library newsletters in the United States.

Index of links to universities and libraries worldwide as well as references to various directories.

List of references structured by topics as internet and science libraries.

Links to worldwide libraries, mostly with descriptions of the specific websites by Kenneth Bishop.

Descriptive listing of US libraries alphabetically and by state, as well as an index of Asian, European, Canadian and special libraries.

Chan Robles & Associates provides links to major law libraries around the world.

List of references indexed by topics like public, school and national libraries. Also includes sections about organisations and science resources.