Why does the power button look like that?

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Tags

1. #binary
2. #means
3. #sleep
4. #indicates
5. #broken
6. #standby
7. #circle
8. #comes
9. #control
10. #using
11. #disconnect
12. #device
13. #partially
14. #system
15. #symbol
16. #state
17. #power
18. #toggle
19. #button
20. #within