This seminar presentation introduces sixth sense technology, which allows users to interact with the digital world through natural hand gestures. It discusses the history of the technology, its components including a camera, projector and mirror coupled in a wearable device, and how it works by capturing gestures and projecting images onto surfaces. Applications include taking photos, zooming and organizing pictures, getting book information, making calls by projecting a keypad, and creating multimedia reading experiences. Advantages include support for multi-touch and multi-user interaction while being portable and cost-effective, though batteries need regular charging and gestures must be correctly recognized. The future scope may include new devices and markets as the technology advances.