A chatterbot is a program that attempts to simulate the conversation or "chatter" of a human being. Chatterbots such as "Eliza" and "Parry" were well-known early attempts at creating programs that could at least temporarily fool a real human being into thinking they were talking to another person. A chatterbot can be thought of as the spokesperson for an artificial intelligence (AI).
Chatterbots have been used in the online interactive games called Tinymuds. A single player may be able to interact with a chatterbot while awaiting other "live" players. At least one company is making a product that lets you build a chatterbot to handle sales-related or other questions on your Web site. And it is not difficult to imagine two chatterbots talking to each other and perhaps even exchanging information about each other so that their conversation could become more sophisticated. (To see how scary this could become, see artificial intellect.) And, of course, they would use some of the more common chat acronyms.