{HEAD ~ A system} for {TAIL ~ collaborative bar code error detection} and correction comprises a network of individual scanning entities for scanning bar coded labels 
for
{ HEAD ~ A system } for { TAIL ~ collaborative bar code error detection } and correction comprises a network of individual scanning entities for scanning bar coded labels
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH