IRC
/ˌaɪ ɑːr ˈsiː/ · Abbreviation · Hacker Culture
Definitions
Short for Internet Relay Chat, an early protocol and ecosystem for real-time text chat organized around servers and channels. IRC played a major role in open source coordination, hacker culture, and early online communities before modern chat platforms took over.
In plain English: An older internet chat system used for group conversations in channels.
Example: "The project still keeps an IRC channel alive even though most contributors moved to Matrix."