Does Apple use open source software?

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Tags

1. #software
2. #example
3. #grows
4. #seeds
5. #source
6. #developers
7. #works
8. #company
9. #darwin
10. #operating
11. #prime
12. #rarely
13. #system
14. #historically
15. #apple
16. #based
17. #development
18. #contribute