This document describes Sixth Sense technology, a wearable gestural interface invented by Pranav Mistry. The technology allows users to access digital information from the physical world using natural hand gestures without electronic devices. It consists of a camera, microphone, projector and sensors. Users can perform tasks like making phone calls, taking photos, scanning books, and drawing images through hand gestures detected by the Sixth Sense interface. The technology bridges the gap between the digital and physical worlds in an intuitive way and offers advantages like portability, cost-effectiveness, and supporting multi-touch interactions.