#type.grapheme  printed characters; "small type is hard to read"
  supertype:  #grapheme__character__graphic_symbol__graphicsymbol  a written symbol that is used to represent speech; "the Greek alphabet has 24 characters"
  subtype:  #type_family  a complete set of type suitable for printing text
  subtype:  #font__fount__face  a specific size and style of type within a type family
     subtype:  #typewriter_font__constant-width_font__fixed-width_font__fixedwidthfont__monospaced_font  a typeface is which each character is given the same width (as by a typewriter)
     subtype:  #proportional_font  any font whose different characters have different widths
        subtype:  #modern_font__modern__Bodoni__Bodoni_font  a typeface (based on an 18th century design by Gianbattista Bodoni) distinguished by regular shape and hairline serifs and heavy downstrokes
        subtype:  #old_style_font__oldstylefont__old_style__oldstyle  a typeface (based on an 18th century design) distinguished by irregularity and slanted ascender serifs and little contrast between light and heavy strokes
        subtype:  #roman_letters__romanletter__roman__roman_type__romantype__roman_print__romanprint  a typeface used in ancient Roman inscriptions
     subtype:  #font_cartridge__cartridge_font__cartridgefont  (computer science) any font that is contained in a cartridge that can be plugged into a computer printer
     subtype:  #black_letter__blackletter__gothic  a heavy typeface in use from 15th to 18th centuries
     subtype:  #boldface__bold_face__bold  a typeface with thick heavy lines
     subtype:  #italic.font  a typeface with letters slanting upward to the right
     subtype:  #screen_font__raster_font  (computer science) the font that is displayed on a computer screen; "when the screen font resembles a printed font a document may look approximately the same on the screen as it will when printed"
     subtype:  #sans_serif__Helvetica  a typeface in which characters have no serifs

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