Answer: i could be wrong but i would suggest looking into migrant labor in central and south america during the time of colonization.
Explanation:
The Incas unified their empire through the spread of their language, compulsory military service for conquered peoples.
Silicon Valley is popularly known for gadgets, computers, and laptops. I think companies that would choose to be at that place are engaged in these kinds of business. It would also include repairs and technical support on troubleshooting that would support the technology.