Categories are a way of grouping pages on like topics within a wiki. For more information, see CategoryCategory. For the original content of this page from 1996, see http://web.archive.org/web/19961129234150/http://c2.com/cgi/wiki?AboutCategoriesAndTopics 

The interesting thing looking at the old page is how little has changed here since then. -- JohnFletcher
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See also HistoryOfWikiCategories
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CategoryWikiHistory