The groff (GNU troff) software is a typesetting package which reads plain text mixed with formatting commands and produces formatted output. The package is essential for viewing online manual pages. Output can be produced in a number of formats including plain ASCII and PostScript. All the standard macro packages are supported. The msys-groff package does not support the HTML nor pdf output devices, becuase MSYS currently provides neither the required postscript interpreter nor the pbmtools. The gxditview viewer is not included. The msys-groff-bin subpackage provides all of the components necessary for a working 'man' installation, while the msys-groff-ext subpackage provides the remaining files needed for supported output devices other than the console, such as postscript and hpgl, as well as additional utilties.