Hello Dan I Am, Welcome to co-ar15.com ! ICQ is an instant messaging computer program. The name ICQ is a play (an oronym) on the phrase "I seek you" / Aim is basically the same thing just a different name...AOL Instant Messenger. That's the one I use, I lke it because it's easy to use. Also it was free to Download. Type in AIM in your browser window and check it out.