Google--what you get for $400 a share

The company's engineers are dabbling in dozens of projects beyond the mainstay search service, from digitized books to local maps. Here's a guide.

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The problem with Amazon Dash buttons

Limits on choice mean new shopping gadget won't click for everyone. Bridget Carey explains how the buttons work, and the rule changes for sharing your Prime perks with others.

by Bridget Carey