This format is ideal for printing to PostScript-capable printers providing the most faithful rendering of the intended fonts, members of the Computer Modern Roman family in most cases.
These documents represent the best choice for printing for users of Microsoft Windows. Adobe Acrobat Reader can display and print the PDF format and is freely available for download.
The code sample above demonstrates a problem of current interest to me, the ineffectiveness of garbage collection in the abscence of referential transparency.