Computer History

What was the name of the first computer network?


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2016-03-24 06:29:06
2016-03-24 06:29:06

The Advanced Research Projects Agency Network (ARPANET) developed by ARPA of the U.S. Department of Defense was the world's first operational packet switching network, and the progenitor of the global internet. In the spring of 1967 at the University of Michigan, ARPA held its yearly meeting of the "principle investigators" from each of its university and other contractors. Results from the previous year's research was summarized and future research was discussed, either introduced by ARPA or the various researchers present at the meetings. Networking was one of the topics brought up at this meeting. The Completion Report continues the story: "At the meeting it was agreed that work could begin on the conventions to be used for exchanging messages between any pair of computers in the proposed network, and also on consideration of the kinds of communications lines and data sets to be used. In particular, it was decided that the inter-host communication 'protocol' would include conventions for character and block transmission, error checking and retransmission, and computer and user identification. The initial ARPANET consisted of four IMPs (Interface Message Processors). They were installed at: UCLA, where Leonard Kleinrock had established a Network Measurement Center (with an SDS Sigma 7 being the first computer attached to it). The Stanford Research Institute's Augmentation Research Center, where Douglas Engelbart had created the ground-breaking NLS system, a very important early hypertext system (with the SDS 940 that ran NLS, named 'Genie', being the first host attached). The UCSB (with the Culler-Fried Interactive Mathematics Centre's IBM 360/75, running OS/MVT being the machine attached). The University of Utah's Graphics Department, where Ivan Sutherland had moved (for a DEC PDP-10 running TENEX). The first ARPANET link was established on November 21, 1969, between the IMP (Interface Message Processor) at UCLA and the IMP at SRI. By December 5, 1969, the entire 4-node network was connected.


The very first computer network connected the 24 SAGE air defence computer sites (23 across the US and one in Canada) together via dedicated leased telephone lines using the first telephone MODEMs.


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