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Instant messages in multi-user systems like CTSS and Multics
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CB Simulator is the first online chat service used in a massive way.
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Suge Internet Relax Chat (IRC). Group talks, private messages and file exchange.
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AOL introduces AIM. Real-time texts, chat rooms and file transfer
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Microssoft launches MSN Messenger. The conversation window with the contact list is customized.
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Skype begins its ascent (created in 2003). Years later it is very popular.
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Google launches Google Talk with information exchange that can be used.
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The social network Twitter is created that transmits or exchanges short messages live.
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Facebook (social network created in 2004) presents its integrated chat. In 2011, it launched an application for iOS and Android.
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2 former Yahoo employees founded Whats App, the most important mobile instant messenger in 2011.