What are the four major types of operating systems?

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Tags

1. #system
2. #process
3. #balance
4. #order
5. #device
6. #types
7. #secondary
8. #computer
9. #management
10. #operating
11. #cache
12. #different
13. #memory
14. #needs
15. #speed
16. #general
17. #storage
18. #available