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Tech Industry

Amazon buys three companies

The e-commerce giant grows bigger, acquiring, Alexa Internet, and today said it agreed to buy Alexa Internet,, and, an Internet triple play that will greatly expand its business, sources said.

Amazon is spending a total of $645 million for the three privately held companies. An announcement concerning the deals, expected to close by June 30, is expected later today. operates the popular, a seller of used and antiquarian books, as well as, which features music memorabilia and rare recordings. Amazon said this will add more than 12 million book and music items for sale.

Alexa Internet offers a free advertising-supported Web navigation service. is an e-commerce company developing technology for business and consumer transactions on the Internet.