This is GNU Ghostscript 5.50a.

Ghostscript is the well-known PostScript interpreter which is
available for all common and most esoteric platforms and supports
many different printers, some displays, and some other formats.

The official ghostscript Web page:
	http://www.cs.wisc.edu/~ghost/index.html

Thomas Merz has written a Ghostscript manual which is available in
PDF from this site and also from Thomas Merz's site in Germany.

	http://www.cs.wisc.edu/~ghost/merz.html

On the german site the manual is also available in German language.

	http://www.muc.de/~tm/free/free.html