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NPL network
The NPL network was a computer network designed by persons from the National Physics Laboratory (hence NPL) within England. The network was first operational as a pilot sometime during 1969, the first version, Mark I, during 1970, and the Mark II version until 1986. 〔〔
==History of the network==
The network was proposed by Donald Davies, who was later was appointed to head of the NPL Division of Computer Science, as ''Proposal for the Development of a National Communications Service for On-line Data Processing'' at NPL during 1965, during 1966 he headed a team which produced a design for the network. The next year (1967) a written version of the proposal entitled ''NPL Data Network'' was presented by Roger Scantlebury at a conference at Gatlinburg of the proceedings of the Association for Computing Machinery, which described how equipment (''nodes'') used to transmit signals (''packets'') would be connected by electrical links to re-transmit the signals between and to the nodes, and interface computers would be used to link node networks to so-called time-sharing computers and other users. The interface computers would transmit multiplex signals between networks, and nodes would switch transmissions while connected to electrical circuitry functioning at a rate of processing amounting to mega-bits.〔(source: Gatlinburg, ... Association for Computing Machinery)〕〔(source: Roger Scantlebury - p.201)〕〔〔Oxford Dictionaries - (word definition - ''relay'' ) & (word definition - ''node'' ) published by Oxford University Press (2015-08-16 )〕〔J. Everard - (VIRTUAL STATES (p.14) ) published by Routledge 28 Feb 2013 (reprint), 176 pages, ISBN 1134692757 (2015-08-16 )(source: NPL Data Network)〕
The network used lines running at 768 Kilobytes per second.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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