The best replacement for barcode is rfid.

The best alternatives to barcode are rated as following:
★★★★★  rfid
★★★★  qr code
★★  upc
★★  2d barcode
★  bar code
★  isbn
★  magnetic strip
★  ocr
★  qr
  data matrix
  barcode
  intelligent mail barcode
  magstripe
  sku
  1d
  radio frequency identification
  non-2d barcode
  magnetic stripe

Your alternative for barcode is not listed? Suggest!
Speaking about barcode, one probably shouldn't forget about quickbooks.

Other search terms related to barcode and their ratings are:
★★★★★ quickbooks
★★ isbn
isbn number
You have in mind a companion for barcode and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of barcode in all years. Click on graph for more.
barcode
rfid
qr code