{{Main|#REDIRECT [[Network Control Protocol (ARPANET)}}#Network Control Program]]
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'''Network Control Program''' (usually given as '''NCP''') was the name for the software on [[host (network)|hosts]] which implemented the [[Network Control Protocol (ARPANET)|Network Control Protocol]] of the [[ARPANET]].<ref name="NCPOrigin">{{Cite IETF|rfc=33|title=New HOST-HOST Protocol|access-date=2022-08-04}}</ref><ref>{{Cite IETF|rfc=1000|title=The Request For Comments Reference Guide|date=1987|last1=Reynolds|first1=J.|last2=Postel|first2=J.|quote=Over the next few months we designed a symmetric host-host protocol, and we defined an abstract implementation of the protocol known as the Network Control Program. ("NCP" later came to be used as the name for the protocol, but it originally meant the program within the operating system that managed connections. The protocol itself was known blandly only as the host-host protocol.)}}</ref>
It was almost universally referred to by the acronym, NCP. This was later taken over to refer to the [[protocol stack|protocol suite]] itself.<ref name="NCPReuse1">{{Cite web|url=http://www.postel.org/ien/pdf/ien011.pdf|title=Internetting or Beyond NCP|access-date=2022-08-04}}</ref><ref name="NCPReuse2">{{Cite IETF|ien=18|title=Proposed Revisions to the TCP|url=https://www.rfc-editor.org/ien/ien18.pdf|access-date=2022-08-04}}</ref>
NCP's were written for many [[operating system]]s, including [[Multics]], [[TENEX (operating system)|TENEX]], [[Unix|UNIX]] and [[TOPS-10]], and many of those NCP's survive (although of course they are now only used by [[vintage computer]] enthusiasts).
==References==
{{reflist}}
[[Category:ARPANET]]
== External links ==
* [https://gunkies.org/wiki/Network_Control_Program_(ARPANET) Network Control Program] - NCP details at the Computer History Wiki
