If you follow discussions about the Internet of Things, you've probably heard this stunning prediction at least once: The world will have 50 billion Internet-connected devices by 2020. Ericsson's former CEO, Hans Vestburg, was among the first to toss out that number, when he gave a 2010 presentation to shareholders. The following year, Dave Evans, who worked for Cisco at the time, published the same prediction in a white paper.
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