Category:Categories by topic
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See also category: Categories by subject (flat list).English: Subcategories contain indexes of concepts about their topics, they are flat lists and can be seen as long index lists like you can find at the end of a text book about the topic.
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Subcategories
This category has the following 79 subcategories, out of 79 total.
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Pages in category "Categories by topic"
This category contains only the following page.