The expression online chat comes from the word chat which means "informal conversation".Online chat includes web-based applications that allow communication – often directly addressed, but anonymous between users in a multi-user environment.created by Compu Serve executive Alexander "Sandy" Trevor in Columbus, Ohio.Ancestors include network chat software such as UNIX "talk" used in the 1970s.
The first online chat system was called Talkomatic, created by Doug Brown and David R.
Chat messages are generally short in order to enable other participants to respond quickly.
Thereby, a feeling similar to a spoken conversation is created, which distinguishes chatting from other text-based online communication forms such as Internet forums and email.
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.