Unused categories

The following category pages exist, although no other page or category makes use of them.

Showing below up to 19 results in range #1 to #19.

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1. Authentication and login
2. Customization techniques
3. Customization techniques/categories
4. Data exchange with other systems
5. Extensions
6. Extensions/categories
7. Help/categories
8. Localisation
9. MediaWiki administration
10. MediaWiki components/categories
11. MediaWiki configuration
12. MediaWiki technical documentation/categories
13. Personalization
14. Pogonological Singularites Among Computer Scientists
15. Tools
16. User interface
17. User interface/categories
18. Wiki markup
19. Wiki page URLs

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