The document describes Sixth Sense, a wearable gestural interface developed by Pranav Mistry that augments the physical world with digital information. It consists of a camera, projector, and mirror worn around the neck that allows users to interact with projected interfaces on surfaces using natural hand gestures. Sixth Sense bridges the gap between physical and digital worlds by bringing intangible information into the tangible world and allowing interaction via gestures. It has applications such as maps, videos, product information and more. The technology aims to make any surface a touchscreen and the entire world a computer interface.