transistors, which led to Atalla resigning from Bell Labs and joining Hewlett-Packard in 1961. However, the MOSFET generated significant interest at RCA and Fairchild Semiconductor. In late 1960, Karl Zaininger and Charles Meuller fabricated a MOSFET at RCA, and Chih-Tang Sah built a MOS-controlled tetrode at Fairchild. MOS devices were later commercialized by General Microelectronics and Fairchild in 1964. The development of MOS technology became the focus of startup companies in California, such as Fairchild and Intel, fuelling the technological and economic growth of what would later be called Silicon Valley. Following the 1959 inventions of the monolithic integrated circuit (IC) chip by Robert Noyce at Fairchild, and the MOSFET (MOS transistor) by Mohamed Atalla and Dawon Kahng at Bell Labs, Atalla first proposed the concept of the MOS integrated circuit (MOS IC) chip in 1960, and then the first commercial MOS IC was introduced by General Microelectronics in 1964. The development of the MOS IC led to the invention of the microprocessor, incorporating the functions of a computer's central processing unit (CPU) on a single integrated circuit. The first single-chip microprocessor was the Intel 4004, designed and realized by Federico Faggin along with Ted Hoff, Masatoshi Shima and Stanley Mazor at Intel in 1971. In April 1974, Intel released the Intel 8080, a "computer on a chip", "the first truly usable microprocessor". Origins of the Internet On April 23, 1963, J. C. R. Licklider, the first director of the Information Processing Techniques Office (IPTO) at The Pentagon's ARPA issued an office memorandum addressed to Members and Affiliates of the Intergalactic Computer Network. It rescheduled a meeting in Palo Alto regarding his vision of a computer network, which he imagined as an electronic commons open to all, the main and essential medium of informational interaction for governments, institutions, corporations, and individuals. As head of IPTO from 1962 to 1964, "Licklider initiated three of the most important developments in information technology: the creation of computer science departments at several major universities, time-sharing, and networking." In 1969, the Stanford Research Institute (now SRI International), operated one of the four original nodes that comprised ARPANET, predecessor to the Internet. Emergence of venture capital By the early 1970s, there were many semiconductor companies in the area, computer firms using their devices, and programming and service companies serving both. Industrial space was plentiful and housing was still inexpensive. Growth during this era was fueled by