The Internet has become impossible to ignore in the past two years. Even people who do not own a computer and have no opportunity to "surf the net" could not have missed the news stories about the Internet, many of which speculate about its effects on the ever-increasing number of people who are on line. Why, then, have communications researchers, historically concerned with exploring the effects of mass media, nearly ignored the Internet? With 25 million people estimated to be communicating on the Internet, should communication researchers now consider this network of networks [1] a mass medium? Until recently, mass communications researchers have overlooked not only the Internet but the entire field of computer-mediated communication, staying instead with the traditional forms of broadcast and print media that fit much more conveniently into models for appropriate research topics and theories of mass communication.