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    copied!<p><a href="http://en.wikipedia.org/wiki/Instant_messaging" rel="nofollow noreferrer">Instant Messaging</a> has been around from long time (mid to late 60), but <a href="http://en.wikipedia.org/wiki/IRC" rel="nofollow noreferrer">IRC</a> did not come before 1988.</p> <p><del>Video communication</del>, on top of that, (as in, for instance, <a href="http://en.wikipedia.org/wiki/Windows_Live_Messenger" rel="nofollow noreferrer">Windows Live Messenger</a>, or Skype, or ...) really did <a href="https://stackoverflow.com/questions/287764#287776">change the way we are communicating</a> ;) <del>and is much more recent.</del> </p> <hr> <p><strong>&lt;correction&gt;</strong><br> (see <a href="http://www.answers.com/topic/videoconferencing#History" rel="nofollow noreferrer">VideoConferencing: 1968</a>, <a href="http://wpcontent.answers.com/wikipedia/en/thumb/6/64/On_Line_System_Videoconferencing_FJCC_1968.jpg/180px-On_Line_System_Videoconferencing_FJCC_1968.jpg" rel="nofollow noreferrer">alt text http://wpcontent.answers.com/wikipedia/en/thumb/6/64/On_Line_System_Videoconferencing_FJCC_1968.jpg/180px-On_Line_System_Videoconferencing_FJCC_1968.jpg</a>, as Alan Kay <em>himself</em> points out in the comment: </p> <blockquote> <p>Again, please check out what <a href="http://www.bootstrap.org/chronicle/pix/pix.html#2D" rel="nofollow noreferrer"><strong>Engelbart demoed in 1968</strong></a> (including live video chatting and screen sharing). <strong>IOW, guessing really doesn't work as well as looking things up</strong>. This is why most people make weak assumptions about when things were invented.)</p> </blockquote> <p>Take that in <em>my</em> face ;), and rightfully so.</p> <p>Note: the "webcam" (video setup) of those times were not exactly made for your average living-room ;)</p> <p><img src="https://i.stack.imgur.com/7Nyi7.jpg" width="450"/></p> <p><strong>&lt;/correction&gt;</strong></p> <hr> <p>[... resuming the answer:]</p> <p>The generalization of <a href="http://www.answers.com/topic/web-cam#History" rel="nofollow noreferrer">webcam</a> <a href="http://wpcontent.answers.com/wikipedia/commons/thumb/c/c5/Logitech_Quickcam_Pro_4000.jpg/180px-Logitech_Quickcam_Pro_4000.jpg" rel="nofollow noreferrer">alt text http://wpcontent.answers.com/wikipedia/commons/thumb/c/c5/Logitech_Quickcam_Pro_4000.jpg/180px-Logitech_Quickcam_Pro_4000.jpg</a> helped too (Started in 1991, the first such camera, called the CoffeeCam, was pointed at the Trojan room coffee pot in the computer science department of Cambridge University).</p> <p>So: Post-1980: 2 out of 3: IRC and Webcam.</p>
 

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