Binary package “libgs9” in ubuntu cosmic

interpreter for the PostScript language and for PDF - Library

 GPL Ghostscript is used for PostScript/PDF preview and printing.
 Usually as a back-end to a program such as ghostview, it can display
 PostScript and PDF documents in an X11 environment.
 .
 This package provides the Ghostscript library which makes the
 facilities of GPL Ghostscript available to applications.