Cisco Systems' (CSCO -0.52%) estimate that the Internet of Things will generate $19 trillion in profits and cost savings through 2024 is one of the most-repeated and controversial talking points in tech. It's also one of the most exciting.

Coffee machines sharing information with refrigerators, fitness trackers, and other appliances might not initially stand out as a revolutionary opportunity, but an explosion of data stemming from a growing number of sensors and increased device communication has the potential to reshape interaction at the human and machine levels. 

Click through the slideshow below to see why Cisco believes that IoT is a $19 trillion opportunity, and how the company plans to take advantage.

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7 Stats That Tell Cisco's Internet of Things Story from The Motley Fool.