The tech revolution could change (or erase) your job by 2020

The Fourth Industrial Revolution is under way and while it could lead to the loss of more than 7 million jobs over the next few years, it also should add jobs in the fields of computer science, math and engineering.

The global workforce is expected to go through "significant churn" in the next four years, according to a report from the World Economic Forum, a Geneva, Switzerland-based organization focused on analyzing and improving the state of the world.

"Developments in previously disjointed fields, such as artificial intelligence and machine learning, robotics, nanotechnology, 3D printing and genetics and biotechnology are all building on and amplifying one another," the report noted. "Smart systems -- homes, factories, farms, grids or entire cities -- will help tackle problems ranging from supply chain management to climate change."

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