{HEAD ~ Each individual scanning entity} includes {TAIL ~ a scanning system} having a decoder for decoding scanned bar code information and a printhead defect identifier for identifying printhead defects from scanned bar code information that cannot be decoded and for constructing printhead defect models for use in correcting future bar code scans 
includes
{ HEAD ~ Each individual scanning entity } includes { TAIL ~ a scanning system } having a decoder for decoding scanned bar code information and a printhead defect identifier for identifying printhead defects from scanned bar code information that can not be decoded and for constructing printhead defect models for use in correcting future bar code scans
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH