And this is a two-way street -- the hosts get to size you up, too, through your online account.

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And so this is a two-way street.

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The European Union, by seeking to enforce competition and other rules, has been driving Italy to fight for its place in the wider market, but this is a two-way process: it also opens up Italy's markets to outsiders.

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Without this kind of two-way communication, engagement is just a pipe dream.

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Note: This is part I of a two-part look at the sustainability initiatives under way at the Hilton Concord, located in Northern California.

FORBES: Northern California Hilton Aims To Be Sustainability Leader

Originally announced at CES this year, this gaming headset is a multi-functional tool that works first and foremost as a two-way communication device for gamers who love to yap while fragging.

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Shauna Mei, who is launching online specialty retailer AHALife this month, aims for her site to be a two-way conversation.

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How the next two installments in the trilogy are going to deal with the two and the three-way love triangle that lies ahead without this animating element is a mystery.

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