The users in a particular chat room are generally connected via a shared interest or other similar connection, and chat rooms exist catering for a wide range of subjects.
New technology has enabled the use of file sharing and webcam to be included in some programs. The first online chat system was called Talkomatic, created by Doug Brown and David R.
The term chat room, or chatroom, is primarily used to describe any form of synchronous conferencing, occasionally even asynchronous conferencing.
The term can thus mean any technology ranging from real-time online chat and online interaction with strangers (e.g., online forums) to fully immersive graphical social environments.
Talkomatic was very popular among PLATO users into the mid-1980s.