Encyclopedia

There are many online encyclopedia are available free. You can also download some encyclopedia in you computer. Some famous online encyclopedia are Wikipedia, Encarta, Britannica and some specific encyclopedia of medical, science, computer, kids, engineering, Urdu, Pakistan and about other topics in World are also available online.

Wikipedia

http://en.wikipedia.org

Wikipedia is one of the largest online encyclopedias in the world. This site presents facts, figures and information in format of documents, images, audio and video. You can also read this encyclopedia in urdu and other languages such as Arabic, bahsa, deutsch, german, French etc. this is free and anyone can edit it.

Britannica

http://www.britannica.com/

Britannica is very famous encyclopedia. It is free online. Get here information on any topic. You can also see here world atlas and much more. It is not free totally but a trial version of Britannica.

Encarta

http://dictionary.msn.com/

Encarta is products of Microsoft corporation. It has more that 62000 articles and documents. It is basically a digital encyclopedia. It covers all topics of computer and other information with the help of videos, clips, maps and documents.