9.1 Public community terminals
Community Memory in Berkeley used shared terminals and a central computer to let users post and retrieve public messages.
9.2 Dial-up BBS
Christensen and Suess launched CBBS in 1978, using a microcomputer and modem to reproduce a community bulletin board electronically [1].
9.3 BBS proliferation
Hobbyists created boards with message areas, files, games and local cultures, often limited by one phone line and long-distance charges.
9.4 Usenet formation
Usenet emerged around 1979-1980 as a general-access Unix news network, initially exchanging articles through dial-up links [2][3].
9.5 Article standardisation
RFC 850 and RFC 1036 documented headers, control messages, transmission methods and propagation algorithms [3][4].
9.6 Federation and hierarchy
Newsgroups, feeds, site policy and moderation created a distributed but governed public discussion system.
9.7 IRC creation
Jarkko Oikarinen implemented IRC in 1988 from a BBS-chat context; it grew into interconnected server networks [5]-[7].
9.8 Live channel governance
Nicknames, operators, channel modes, kicks and bans made governance part of the real-time protocol environment.
9.9 Web migration
Web forums and portals absorbed many BBS and Usenet functions while often centralising hosting and identity.
9.10 Persistent legacy
Federated forums, group chat, Discord-like servers, Matrix, Slack and social platforms inherit combinations of boards, feeds, channels and operator powers.