What information do QR codes contain?

Related questions

1. Do students use QR codes?
2. How are QR codes used in marketing?
3. Do customers use QR codes?
4. What are QR codes in education?
5. What are QR codes used for in education?
6. What is the difference between 2d barcodes and QR codes?

Tags

1. #information
2. #readable
3. #response
4. #barcode
5. #dimensional
6. #abbreviated
7. #machine
8. #attached
9. #trademark
10. #contains
11. #matrix
12. #about
13. #japan
14. #optical
15. #automotive
16. #designed
17. #first
18. #which
19. #industry
20. #quick
21. #label