A system and method capable of reading machine-readable labels from physical objects, reading coordinate labels of geographical locations, reading timestamp labels from an internal clock, accepting digital text string labels as input obtained directly from a keyboard type input device, or indirectly...http://www.google.com/patents/US20030024975?utm_source=gb-gplus-sharePatent US20030024975 - System and method for authoring and providing information relevant to the physical world
