Internet properties established in 1980

thumb|upright=1.3|A 2004 discussion in the Usenet group comp.text.tex thumb|A diagram of Usenet servers and clients. The coloured dots on the servers represent the newsgroups they carry. Coloured arrows between servers indicate newsgroup content exchanges (news feeds). Arrows between clients and servers indicate that a user is subscribed to a certain newsgroup and reads or submits articles there.Notably, clients never connect with each other, but still have access to each other's posts even when they also never connect to the same server.