What is a UDID number used for?

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Tags

1. #udids
2. #unique
3. #number
4. #device
5. #developer
6. #often
7. #identifier
8. #registering
9. #physical
10. #another
11. #program
12. #devices
13. #development
14. #identification
15. #developers
16. #purposes
17. #apple