Complex sentence: These fonts not only has glyphs for characters of TACE16 format, but also has glyphs for the current Unicode encoding for ASCII characters and Tamil characters, so that it can provide backward compatibility for reading existing files.
Split into simpler sentences: These fonts not only has glyphs for characters of TACE16 format, but also has glyphs for the current Unicode encoding for ASCII characters and Tamil characters. So that it can provide backward compatibility for reading existing files.