View details and encodings for Unicode character U+228B Superset Of With Not Equal To, located in the Mathematical Operators block and Math Symbol category. This character was released in 1993 under Unicode version 1.1.
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⊋⊋U+228B;8843\00228B\u228B\x{228B}\u{228B}u'\u228B'E28A8B228B0000228B