What are the three main purpose of an operating system?

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Tags

1. #services
2. #resources
3. #execute
4. #applications
5. #processing
6. #operating
7. #manage
8. #establish
9. #provide
10. #memory
11. #functions
12. #three
13. #drives
14. #central
15. #computer
16. #printers
17. #software
18. #interface
19. #system