Video conferencing still isn't ubiquitous, but Apple's done a lot to move the needle by building FaceTime into its Mac and iOS products. FaceTime originated on iOS devices with the introduction of the iPhone 4, but it came to the Mac in pretty short order when OS X Lion was previewed in October, 2010. FaceTime enables Mac and iOS users alike to communicate using voice and/or video. It's not a group chat system - it's a one-to-one communication system designed for personal communication.