The precursor to the Internet was the Advanced Research Projects Agency Network. ARPANET was a network developed by the Advanced Research Projects Agency in the late 1960s, with network nodes initially located at major universities, Department of Defense research labs and military installations.
The first meeting to discuss the ARPANET occurred in 1967, with 1969 seeing the first release of ARPANET technology. The first four connected sites were located at the University of California at Los Angeles, the University of California at Santa Barbara, the University of Utah and Stanford Research Institute. By 1980, there were 200 host computers connecting 20,000 people, primarily at universities and government facilities. By January 1999, ARPANET had developed into the modern Internet, with over 43 million users worldwide.