Term of the Moment
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Redirected from: Advanced Research Projects Agency
Definition: ARPAnet
(Advanced Research Projects Agency NETwork) The research network funded by the U.S. Advanced Research Projects Agency (ARPA) that was the precursor to the Internet. The project was conceived in 1966 by ARPA employee Robert Taylor, who wanted to share information among researchers at major universities.
TCP/IP Was Added
Over the next decade, ARPAnet spawned other networks, and in 1983 with more than 300 computers connected, its protocols were changed to TCP/IP. In that same year, the unclassified military MILNET network was split off from ARPAnet.
It Became the Internet
As TCP/IP and gateway technologies matured, more disparate networks were connected, and the ARPAnet became known as "the Internet" and "the Net." Starting in 1987, the National Science Foundation began developing a high-speed backbone between its supercomputer centers. Intermediate networks of regional ARPAnet sites were formed to hook into the backbone, and commercial as well as non-profit network service providers were formed to handle the operations. Over time, other federal agencies and organizations formed backbones that linked in.
The Big Shift
In 1995, commercial Internet service providers took control of the major backbones, and the Internet grew exponentially. See Internet and packet switching.
Humble Beginnings
TCP/IP Was Added
Over the next decade, ARPAnet spawned other networks, and in 1983 with more than 300 computers connected, its protocols were changed to TCP/IP. In that same year, the unclassified military MILNET network was split off from ARPAnet.
It Became the Internet
As TCP/IP and gateway technologies matured, more disparate networks were connected, and the ARPAnet became known as "the Internet" and "the Net." Starting in 1987, the National Science Foundation began developing a high-speed backbone between its supercomputer centers. Intermediate networks of regional ARPAnet sites were formed to hook into the backbone, and commercial as well as non-profit network service providers were formed to handle the operations. Over time, other federal agencies and organizations formed backbones that linked in.
The Big Shift
In 1995, commercial Internet service providers took control of the major backbones, and the Internet grew exponentially. See Internet and packet switching.
Scrawled on this paper in 1969 were the first four nodes of the ARPANET. Little did they realize these four would grow to more than a billion. The four computers were the IBM System/360, the 940 and Sigma 7 from Scientific Data Systems (SDS) and Digital Equipment's PDP 10. (Image courtesy of The Computer History Museum.)