On a unix host one can initiate session by:
% irc nicknameor if some specific server should be used
% irc nickname servernameThere are clients for various platforms; Unix, DOS, VMS, macs, .. In Unix, which is most common environment, there are clients for dumb terminals, emacs and graphical interfaces like X11. To find all these clients check the software page.
For those without local IRC client installed yet, there are not many telnet'able public access clients. This is all I know of: