I’m not a fan of color for categorizing books either, but Dewey’s classification is underpinned by incredibly racist ideas. Perhaps look at any one of the many others?
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Chris Aldrich
I'm a biomedical and electrical engineer with interests in information theory, complexity, evolution, genetics, signal processing, IndieWeb, theoretical mathematics, and big history. I'm also a talent manager-producer-publisher in the entertainment industry with expertise in representation, distribution, finance, production, content delivery, and new media. View all posts by Chris Aldrich
I think it’s time for a new,web-based classification system, Thankfully the Open Library is doing just that.