Internet Public Library

www.ipl.org

The International Digital Opened Archive

http://arXiv.org

King Fahad National Library

www.kfnl.gov.sa

Al Waraq

www.alwaraq.net

Bibliotheca Alexandrina

www.bibalex.org

World International Library

www.wdl.org

The World Catalog

http://www.worldcat.org

 Library of Congress Online Catalog

http://catalog.loc.gov

Arab Federation for libraries & Information (AFLI)

http://afli.info

The International Federation of Library

Associations and Institutions (IFLA)

http://ifla.org

American Library Association

http://www.ala.org

Arabic Union Catalog

http://www.aruc.org