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Instant messaging (IM) is a service that allows you to communicate with other people in real time. If two of you are online at the same time, you can communicate by sending messages that immediately pop up on the other person's screen. Both sides of the conversation display in the message window, labeled with the sender's name, so you can see the ongoing dialogue. There are several IM services. The most popular are:
You can only instant message with someone who is logged in to the same IM service that you are logged in to. However, you can be logged in to more than one service at the same time and chat with people on different services at the same time. This chapter provides instructions for using AIM and MSN, the two most popular services. Two steps are required for instant messaging:
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