What are VirtualBox guest additions?

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Tags

1. #operating
2. #system
3. #drivers
4. #collection
5. #guest
6. #designed
7. #device
8. #additions
9. #closer
10. #overall
11. #interactive
12. #usability
13. #applications
14. #integration
15. #achieve
16. #performance
17. #systems
18. #between
19. #enhance
20. #virtualbox