The best replacement for barcodes is rfid.

The best alternatives to barcodes are rated as following:
★★★★★  rfid
★★★★  suburbs
★★★  qr codes
★★  beams
★★  barcodes
★  proline suburbs
★  rfid tags
★  pressure points
  2d barcodes
  magnetic strips

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Google Trends

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barcodes
rfid
suburbs