Why is foo used?

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Tags

1. #sometimes
2. #purpose
3. #functions
4. #documentation
5. #entities
6. #referred
7. #placeholder
8. #commands
9. #terms
10. #alternatively
11. #whose
12. #fubar
13. #names
14. #metasyntactic
15. #computer
16. #programming
17. #foobar
18. #variables
19. #related