Silicon Valley is the southern part of the San Francisco Bay Area in Northern California,United States. The term originally referred to the region's large number of silicon chipinnovators and manufacturers. Despite the development of other high-tech economic centers throughout the United States, Silicon Valley continues to be the leading high-tech hub because of its large number of cutting-edge entrepreneurs, engineers and venture capitalists.
Since the early twentieth century, Silicon Valley has been home to a vibrant, growing electronics industry. The industry began through experimentation and innovation in the fields of radio, television, and military electronics. Stanford University, its affiliates, and graduates have played a major role in the evolution of this area.
It was in Silicon Valley that the silicon-based integrated circuit, the microprocessor, the microcomputer, among other key technologies, were developed, and has been the site of electronic innovation for over four decades, sustained by about a quarter of a million information technologyworkers. Silicon Valley was formed as a milieu of innovations by the convergence on one site of new technological knowledge; a large pool of skilled engineers and scientists from major universities in the area; generous funding from an assured market with the Defense Department; the development of an efficient network of venture capital firms; and, in the very early stage, the institutional leadership of Stanford University.
Although semiconductors are still a major component of the area's economy, Silicon Valley has been most famous in recent years for innovations in software and Internet services. Silicon Valley has significantly influenced computer operating systems, software, and user interfaces.
Eventually, Silicon Valley is known all the high-tech businesses in the area; it is now generally used as a metonym for the high-tech sector. Software, Tools and other IT products are produce here replacing the traditional manufacturing facilities.
(from Wikipedia)