As an example, it is considered rude to write only in upper case, because it appears as if the user is shouting.
Private shows can only be won on special occasions.
Online chat in a less stringent definition may be primarily any direct text-based or video-based (webcams), one-on-one chat or one-to-many group chat (formally also known as synchronous conferencing), using tools such as instant messengers, Internet Relay Chat (IRC), talkers and possibly MUDs.
The expression online chat comes from the word chat which means "informal conversation".
The first online chat system was called Talkomatic, created by Doug Brown and David R.
Woolley in 1973 on the PLATO System at the University of Illinois.