ICQ (I Seek You) is a worldspanning network, kinda simular to the IRC. ICQ:s main purpose is however, unlike the IRC, to make it easy to conntact people on the internet. You make a list of your friends (the "contact list") and then you can see when theyre online, send messages, files, and chat in realtime with them! ICQ is really a useful program, and its easy to use. You can download it for free from mirabelis, the company who created it.