#character_set__characterset  an ordered list of characters that are used together in writing or printing
  supertype:  #listing__list  a database containing an ordered array of items (names or topics)
  instance:  #ASCII_character_set
  subtype:  #alphabet  a character set that includes letters
     subtype:  #phonetic_alphabet__sound_alphabet__soundalphabet  an alphabet of characters intended to represent specific sounds of speech
        subtype:  #visible_speech.phonetic_alphabet__visiblespeech  a phonetic alphabet invented by Alexander Melville Bell in the 19th century
     subtype:  #manual_alphabet__finger_alphabet  an alphabet used by the deaf; letters are represented by finger positions
     instance:  #Roman_alphabet  #Hebrew_alphabet__Hebraic_alphabet__Aramaic_alphabet  #Greek_alphabet  #Cyrillic_alphabet__Cyrillic  #Arabic_alphabet
  subtype:  #alphanumerics__alphanumeric  a character set that includes letters and digits and punctuation marks

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