The range of products and services sold on are expanding quickly as part of CEO Jeff Bezos' vision for the Internet retailer. Karen Bleier/AFP/Getty Images hide caption

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Amazon may be the first major company to launch a cloud-based music service, but Apple and Google may not be far behind. hide caption

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The front cover for A Present for Milo, a top children's book app from Ruckus Media Group. This and other kids' books apps are redefining the way children are reading. Ruckus Media Group hide caption

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The Amazon Kindle 3G reader, or, alternatively, a tablet. Bloomberg via Getty Images hide caption

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