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A Nest Learning Thermostat is shown in West Newbury, Mass. The global installed base of smart thermostats will grow from fewer than 1.4 million in 2013 to 31.9 million by 2020, according to a report by Navigant Research. (Ann Hermes/The Christian Science Monitor/File)

3:43 pm ET -

Tech companies are excited about the 'Internet of Things,' but what exact does that mean? Just imagine your household appliances, Web-enabled and sharing info.

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