The humanities and social sciences category refers to the two major categories of humanities and social sciences. Humanities refers to various cultural phenomena in human society, and social science refers to social sciences. This term is mainly used to classify books in bookstores, including physical bookstores and online virtual bookstores. Humanities and social science books account for a large proportion of books. Mainly including culture, history, philosophy/religion, ancient books, politics/military, law, social science, psychology and other categories.