Background
The phrase “virtual graffiti” has existed for a long time and has been applied to numerous different applications over the years. Originally, it referred to posting messages on electronic bulletin board systems and marking up whiteboard applications. From there, it developed in academia into contextual messaging applications. Several such examples are given below. In addition to contextual messaging, we also give some background information on three other key industry and entertainment applications.
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—Mary Barnett Gilson (1877?)
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—Henry David Thoreau (18171862)
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