Web chat, or #cs-york on irc.freenode.net
IRC, or Internet Relay Chat, is a protocol with a long and glorious history stretching back into the mists of time. It’s a pretty simple system for online chatrooms, and you don’t even need a special program to connect to it, although they do exist.
/nick new_name, and join a new channel with
Interpretation of the rules is up to the discretion of the channel operators.