US Patent 7834877 System-wide content-sensitive text stylization and replacement

System-wide content-based text stylization by establishing an array of predefined stylization criteria, intercepting text output generated by an operating system to a graphics device driver, rasterizing the text according to the predefined stylization criteria and passing the rasterized images to the graphics device driver for display. The array of predefined stylization criteria includes criteria that modify font size, font type, font color, font highlighting, underline, bold, italics and invoke character replacement. Stylization may be based on parameters such as syllables, consonants, vowels, and punctuation and/or applied by a lookup table against predefined strings.