What does open as portable device mean?

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Tags

1. #provides
2. #store
3. #which
4. #device
5. #running
6. #model
7. #means
8. #changes
9. #require
10. #computer
11. #should
12. #between
13. #interaction
14. #machine
15. #programs
16. #plugged
17. #storage
18. #their
19. #software
20. #itself
21. #portable