LAS VEGAS — Organizers of CES boast that nearly 4,000 companies are exhibiting technology for 175,000 visitors. Of those 4,000 companies, about 1,000 work in the Internet of Things arena.

And of those 1,000, it’s safe to say the overwhelming majority build software, microprocessors and sensors that go into final products but aren’t seen by consumers. Their work goes beneath the surface of these products, including cars, ear buds that double as heart rate monitors and even Samsung’s new smart Family Hub refrigerator.

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