Silicon Valley

Silicon Valley was near San Francisco.

Brendan Richards went there because he got a job there. He was unable to attend Lavinia Smith's funeral as a result of his work in California. (AUDIO: Comeback) He got a job in a software development company. (PROSE: The Lost Boy)

The Ninth Doctor likened Nomicae, given the presence of multiple tech giants, as the Silicon Valley of the 54th century. (COMIC: The Bidding War)