The communities at the southern region of the Bay Area, with a population of over 2 million residents, are primarily located in what is known as Silicon Valley. These include the city of San Jose, and surrounding locales, including the high-tech hubs of Santa Clara, Milpitas, Cupertino, Mountain View and Sunnyvale.
The area has become the premier technology center of the United States. Notable tech companies headquartered in Silicon Valley include AMD, Adobe, Intel, Netflix, Cisco Systems, Hewlett-Packard, Apple, Google, eBay, Facebook and Yahoo!. The San Jose-Sunnyvale-Santa Clara, CA Metropolitan Statistical Area has the most millionaires and the most billionaires in the United States per capita.