What is a QR code used for?

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Tags

1. #quick
2. #machine
3. #information
4. #stands
5. #codes
6. #label
7. #store
8. #dimensional
9. #optical
10. #readable
11. #first
12. #nothing
13. #response
14. #barcode
15. #developed
16. #square
17. #barcodes
18. #japan
19. #other