IRC (Internet Relay Chat) is a virtual meeting place where people from all over the world can meet and talk; you'll find the whole diversity of human interests, ideas, and issues here, and you'll be able to participate in group discussions on one of the many thousands of IRC channels, on hundreds of IRC networks, or just talk in private to family or friends, wherever they are in the world.
To use IRC you need a small program like mIRC, an IRC client for Windows, written by Khaled Mardam-Bey. mIRC is a friendly IRC client that is well equipped with options and tools. mIRC is shareware, which means that you can download mIRC and try it out freely for 30 days to evaluate it. If during, or at the end of, the evaluation period you decide that you would like to continue using mIRC, you must register your copy.