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

itoggle caption Karen Bleier/AFP/Getty Images

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

itoggle caption Ruckus Media Group