America’s Leading High-Tech Metros

For years, Silicon Valley – home to companies like Intel, Apple, Google and Facebook – has been America's (and the world’s) undisputed high-tech center. But recently, urban centers from San Francisco, home to Twitter, to New York City – which has surpassed greater Boston to become the nation’s second leading center for venture capital investment – have become high-tech hubs as well. This is happening in Europe, too—London’s Silicon Roundabout and Berlin are both emerging as technology centers.

Which cities and metros are America’s high-tech leaders?