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Feel free to mention your own choice, while telling us why.
It's Alibaba.com.
1- E-Commerce websites: Amazon, eBay and Rakuten.
2- Social Websites: Tensent and Facebook.3- Search: Google, Wikipedia and Baidu.
http://en.wikipedia.org/wiki/List_of_largest_Internet_companies
IBM
Amazon
By assets Google is number one, then eBay and3rd is Amazon.
By revenue Amazon is on number one, then Google, and eBay is on3rd.
By profit,1-Google,2-eBay,3-Amazon.
Facebook... I believe.
Microsoft ,it could be AOL as well
Define valuable?