Account
Credentials
Domain
Instant Messaging (IM)
Client-Server model
XMPP / Jabber protocol
XMPP / Jabber server

Concepts bullet Instant Messaging

What is Instant Messaging (IM)?

Instant Messaging[1] is a form of real-time communication between two or more people using personal computers or other devices, using a software application, an IM Client[2], like YateClient.


References:
[1] http://en.wikipedia.org/wiki/Instant_messaging
[2] http://en.wikipedia.org/wiki/Instant_messaging_client