How to Use IRC
IRC stands for "Internet Relay Chat." It's a series of virtual "chat rooms" on different subjects. To use IRC, you will first need IRC client software for your computer.
For a Mac IRC client, you can try IRCle, accessible from the IRCle
Home Page. You might also try Homer (.94.sit.hqx).
To learn how to use Internet Relay Chat (and to find out more about the background of IRC), you should start with the IRC page at SingNet.