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Augmented reality (AR) is technology that seamlessly overlays virtual content over the real world, so that both can be experienced at the same time. According to Ronald Azuma, AR is a system that has three characteristics: (1) it combines real and virtual content, (2) it is interactive in real time, and (3) it is registered in three dimensions. This entry further defines AR, then discusses its history, technological characteristics, and applications. It concludes by looking at areas for future research into AR.

The most common type of AR experience is overlaying virtual images and computer graphics on the real world. For example, the Pokémon GO mobile game allows people to see virtual monsters appearing in the live camera view on their mobile phones. This meets ...

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