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The Internet has revolutionized the way we communicate. E-mail has been the most rapidly adopted form of communication ever known. Less than two decades ago, not many people had heard of it. Now, many of us e-mail instead of writing letters or even calling people on the phone. People around the world send out billions of e-mail messages every day. But sometimes even e-mail isn't fast enough. You might not know if a person you want to e-mail is online at that moment. Also, if you're e-mailing back and forth with someone, you usually have to click through a few steps. This is why instant messaging (IM) has become so popular. You can IM with anyone on your buddy list or contact list as long as that person is online. You type messages to each other into a small window that shows up on both of your screens. In this article, you will learn about the history of instant messaging and how it works.
You will also learn what the major IM programs are, what makes them different from each other and what the future holds for IM. The major online services, such as America Online (AOL), Prodigy and CompuServe, were the main way that ordinary people could connect and communicate with each other online. Online services provide the actual interface that you use when you're connected to the service, which creates a targeted experience for users. In the early 1990s, people began to spend more and more time on the Internet. Creative software developers designed chat-room software and set up chat rooms on Web servers. In a chat room, a group of people can type in messages that are seen by everyone in the "room." Instant messages are basically a chat room for just two people. That's when Mirabilis introduced ICQ, a free instant-messaging utility that anyone could use. ICQ, shorthand for "I seek you," uses a software application, called a client, that resides on your computer.
The client communicates with an ICQ server whenever you are online and the client is running. In 1997, AOL, considered the pioneer of the online community, gave its users the ability to talk in real time with each other through chat rooms and instant messages. In June 1998, AOL acquired Mirabilis and ICQ. The ICQ model is the basis for most instant-messaging utilities on the market today. In the next section we'll examine how these services work. You go to the download page and get a copy of the free software client for your computer. You install the software and open the client. The client tries to connect to the server. It uses a proprietary protocol for communication. Once the client is connected to the server, you can enter your name and password to log in to the server. If this is your first time on, you can sign up for an account and immediately begin using it.
When the server verifies your name and password, you are logged in. The client sends the server the connection information (IP address and number of the port assigned to the client) of the computer you are using. It also provides the user with the names of everyone in your contacts list. The server creates a temporary file that has the connection information for you and the list of your contacts. It then checks to see if any of the users in your contact list are currently logged in. If the server finds any of your contacts logged in, it sends a message back to the client on your computer with the connection information for that user. The server also sends your connection information to the people in your contact list that are signed on. When your client gets the connection information for a person in your contact list, it changes the status of that person to "online." You click on the name of a person in your contact list who is online, and a window opens that you can enter text into.
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