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Understanding IM

Instant messaging or IM as it is more commonly called is something that many users of the internet take for granted. It is the simple ability to send a message instantly to another user. Like SMS it doesn't sound like much but there is a lot going on behind the scenes.

The first challenge facing someone developing an IM-based application is the concept that the event gateway itself is, in effect, an IM client. The server will log on to the IM network in the same way that any other user will log on. It will appear in your IM list as a user and to all outward respects, it is a normal user.


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