Is tag a coded command in HTML?

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Tags

1. #display
2. #including
3. #support
4. #browser
5. #other
6. #hypertext
7. #indicates
8. #coded
9. #tells
10. #displayed
11. #media
12. #contained
13. #angle
14. #document
15. #contents
16. #command
17. #images
18. #should
19. #brackets