{HEAD ~ The invention} has been developed primarily to provide {TAIL ~ the basis} for a surface based interface which allows a user to input and interact with information via a network, and to obtain interactive printed matter on demand via high speed networked color printers 
developed primarily to provide
{ HEAD ~ The invention } has been developed primarily to provide { TAIL ~ the basis } for a surface based interface which allows a user to input and interact with information via a network , and to obtain interactive printed matter on demand via high speed networked color printers
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