Charis SIL and Doulos SIL were created to provide two Unicode-based font families that would contain a comprehensive inventory of glyphs needed for processing Latin or Cyrillic text.

Charis SIL was produced specifically for laser printers. Of the two, Charis SIL tends to be more useful in general publishing. It is available in regular, bold, italic and bold italic styles. Doulos SIL is available only in regular style.

Both fonts make use of state-of-the-art font technologies to support complex typographic issues, such as the need to position arbitrary combinations of base glyphs and diacritics optimally.