Information Service

RefDesk

http://www.refdesk.com/

Allexperts.com

www.allexperts.com

Britannica.com

www.britannica.com

Library of congress: Ask A Librarian

http://www.loc.gov/rr/askalib/

World Public Library

 http://worldlibrary.net/

Internet Public Library

http://www.ipl.org/

eHow

http://www.ehow.com/

Ask Me Help Desk

http://www.askmehelpdesk.com/

Library Spot

 http://www.libraryspot.com/

Dictionary.com

http://dictionary.reference.com/

QuestionPoint

http://www.questionpoint.org/

The Answer Bank

http://www.theanswerbank.co.uk/

Webopedia

http://www.webopedia.com/

Global Arabic Encyclopedia

http://www.mawsoah.net

About

http://www.about.com/

Worldatlas

 http://www.worldatlas.com/

Live Advice

http://www.liveadvice.com/

Infoplease

http://www.infoplease.com/

The World Factbook

https://www.cia.gov/library/publications/the-world-factbook/

Wikipedia

http://en.wikipedia.org

The Free Dictionary

http://www.thefreedictionary.com/

Encyclopedia

http://www.encyclopedia.com/