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TWO DIMENSIONAL DATA CODE READERS; BAR CODE READERS; TWO DIMENSIONAL DATACODE SCANNERS; BAR CODE SCANNERS; ELECTRONIC DATABASE FEATURING TWO DIMENSIONAL CODES RECORDED ON COMPUTER MEDIA AND CAPABLE OF BEING READ BY TWO DIMENSIONAL CODE READERS AND SCANNERS; COMPUTER PROGRAMS FOR TWO DIMENSIONAL CODE DRAWING, COMPUTER PROGRAMS FOR BAR CODE DRAWING, COMPUTER PROGRAM RECORDED ON COMPACT DISKS FOR TWO DIMENSIONAL CODE DRAWING; AND COMPUTER PROGRAM RECORDED ON MEMORY CARDS FOR TWO DIMENSIONAL CODE DRAWING