NNTP (Network News Transfer Protocol) is the protocol used by Usenet news servers and clients (readers).
Usenet is a huge shared message system which is used on the Internet.
Usenet consists of newsgroups such as comp.sys.ibm.pc.hardware.video and rec.collecting.sport.hockey.
Additional Reading on NNTP
The NNTP protocol is defined in RFC 977: Network News Transfer Protocol.
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