Does only Apple use iOS?

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2. What does I in iPhone mean?
3. Which phones use iOS?
4. Is iPhone 7 obsolete?
5. What is the purpose of iOS?
6. Why I is used in iPhone?
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Tags

1. #ipads
2. #google
3. #their
4. #allow
5. #apple
6. #devices
7. #manufacturers
8. #license
9. #system
10. #anyone
11. #unlike
12. #other
13. #microsoft
14. #ipods
15. #operating
16. #iphone
17. #iphones