Patent ID: 7469830

Claim:
An apparatus for performing computer-based operations, the apparatus comprising a computer system which includes at least one computer; a printer which is connected to the computer system and which is capable of printing with visible ink and invisible ink to generate a sheet of media printed with visible information and invisible depictions of coded data on receipt of initial print instructions from the computer system, the computer system being programmed to generate the invisible depictions such that the coded data represents instructions capable of being executed by the computer, the invisible depictions being in the form of an array of tags positioned on at least a portion of the sheet of media, the tags having at least one common target structure and each tag having at least one data area with coded data representing at least one set of bits that define a characteristic of the sheet of media; and a sensor which is capable of detecting the invisible depictions and which is configured to generate a signal carrying said coded data, the sensor being connected to the computer system, which is configured to decode the coded data and to execute the instructions.