Silicon Valley is located in the San Francisco Bay area over 40 cities. San Jose,
Santa Clara,San Mateo, Santa Cruz. Silicon Valley the original home to a semiconductor chip silicon is fine sand as its basic raw materials. It has been known as Silicon Valley since the early twentieth century. Silicon Valley is refered to as the southern part of San Francisco Bay in the northern part of California. Bill Gates first got interested in software and began programing computers at the young age of thirteen. Wow needless to say this was rather interesting to research and find out about in my opinion.