To use TUTOS to its fullest potential there a number of packages that could be of great use. They are listed in this chapter.
jpgraph: it's an external programming library that is used to make nice graphcis. You can find it's source at http://www.aditus.nu/jpgraph/
wv: a set of binary's that can be used to generate information about MS-Word .doc files. you can find it's source at http://www.wvWare.com/
pdflib: not really necessary but there are some demos. you can find it's source at http://www.pdflib.com/