Patent ID: 7703675

Claim:
A system for performing computer-based operations, the system comprising: a computer system configured for: receiving a print request for printing a document; allocating and retrieving a unique document identifier for said document upon receipt of said print request; and associating the document identifier with a description of the document, the description associating at least one instruction with one or more positions in the document; a printer for printing the document containing visible information and coded data tags on a surface simultaneously, each coded data tag encoding position on the surface and each coded data tag further identifying the document identifier; and an optically imaging pen for sensing at least one coded data tag during handwritten input on the document and for generating a signal indicative of the sensed coded data tag; wherein the computer system is further configured for: receiving the signal from the pen; determining the document identifier and the position; retrieving the description associated with the document identifier; and relating the position to the at least one instruction using the retrieved description and executing the at least one instruction.