{HEAD ~ means} for dynamically embedding {TAIL ~ information} into the purchased software after the purchased software has been requested by the user computer; and 
for dynamically embedding
{ HEAD ~ means } for dynamically embedding { TAIL ~ information } into the purchased software after the purchased software has been requested by the user computer ; and
HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH