What is Instant Messaging Reference?
Instant messaging or IM (for short) is real-time chat over the Internet in which users type short messages back and forth, using software such as AOL Instant Messenger (AIM), Yahoo! Messenger, MSN Messenger, and Google Talk. Think of IM as being like e-mail, only faster. IM is also like a telephone conversation, except that the users communicate via text messaging instead of speech.