Origin of IRCI(nternet) R(elay) C(hat).
irc - Computer Definition
A carrier that offers record communications services, which are services that are designed or used primarily to transfer information that originates or terminates in written or graphic form. Examples of record communications services include telex and TWX. See also record communications services, telex, and TWX.
(Internet Relay Chat) Computer conferencing on the Internet. There are hundreds of IRC channels on numerous subjects that are hosted on IRC servers around the world. After joining a channel, your messages are broadcast to everyone listening to that channel. IRC client programs, such as mIRC, provide a graphical interface for all functions, including logging into popular servers and obtaining a list of their active channels. See mIRC, netsplit, SOP and AOP.
irc - Legal Definition