# Third-party classification systems

By [Neton8848](https://paragraph.com/@neton8848) · 2021-10-28

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Various third-party classification systems have been mapped to Wikipedia articles, which can be accessed from these pages:

*   [Library of Congress Classification](https://en.wikipedia.org/wiki/Library_of_Congress_Classification)
    
*   [List of Dewey Decimal classes](https://en.wikipedia.org/wiki/List_of_Dewey_Decimal_classes)
    
*   [Figurative system of human knowledge](https://en.wikipedia.org/wiki/Figurative_system_of_human_knowledge) ([_Encyclopédie_](https://en.wikipedia.org/wiki/Encyclop%C3%A9die))
    
*   [Outline of _Roget's Thesaurus_](https://en.wikipedia.org/wiki/Outline_of_Roget%27s_Thesaurus)
    
*   [_Propædia_](https://en.wikipedia.org/wiki/Prop%C3%A6dia) ([_Encyclopædia Britannica_](https://en.wikipedia.org/wiki/Encyclop%C3%A6dia_Britannica))
    
*   [Tree of knowledge system](https://en.wikipedia.org/wiki/Tree_of_knowledge_system)
    
*   [Universal Decimal Classification](https://en.wikipedia.org/wiki/Universal_Decimal_Classification#UDC_outline)

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*Originally published on [Neton8848](https://paragraph.com/@neton8848/third-party-classification-systems)*