Silicon Alley Manhattan. Silicon Alley initially also used to extend to Dumbo, a neighborhood in Brooklyn. Columbia University and NYU's leaderships were especially important in the alley's early development. The term Silicon Alley may have originated in 1995 by a New York staffing recruiter, Jason Denmark, who was supporting clients in the newly dubbed technical hub in downtown Manhattan; in an effort to attract candidates who, at that time, were focusing on positions in Silicon Valley, he posted in public usenet postings of Object Technology Developers, job ads with the Silicon Alley label. "Subject: NYC - silicon ALLEY" shows up in an
Silicon Valley supports innovation and entrepreneurship. Attempts to create "Silicon Valleys" in environments where disruptive innovation does not go over well have a poor track record. The San Francisco Bay Area has the largest concentration of high-tech companies in the United States, at 387,000 high-tech jobs, of which Silicon Valley accounts for 225,300 high-tech jobs. Silicon Valley has the highest concentration of high-tech workers of any metropolitan area, with 285.9 out of every 1,000 private-sector workers. Silicon Valley has the highest average high-tech salary in the United States at $144,800. Largely a result of the high technology sector, the San Jose-Sunnyvale-Santa Clara,