A method and apparatus is provided for controlling the function of document processing machines such as copying machines and facsimile machines. Control data is submitted to a controller in a two-dimensional symbology having error correcting capability. The control data is decoded and used to process...http://www.google.com.au/patents/US5974202?utm_source=gb-gplus-sharePatent US5974202 - Apparatus and method for processing a machine readable document with embedded machine instructions
