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Woolley in 1973 on the PLATO System at the University of Illinois.
It offered several channels, each of which could accommodate up to five people, with messages appearing on all users' screens character-by-character as they were typed.
These conventions or guidelines have been created to avoid misunderstandings and to simplify the communication between users.
Web conferencing is a more specific online service, that is often sold as a service, hosted on a web server controlled by the vendor.
The first online chat system was called Talkomatic, created by Doug Brown and David R.
Chatiquette varies from community to community and generally describes basic courtesy.
As an example, it is considered rude to write only in upper case, because it appears as if the user is shouting.