Ghostscript is an Adobe PostScript and PDF interpreter written in C used to render, raster, display of the page description languages and to convert PostScript files to PDF and viceversa. Ghostscript  uses graphics and data filtering techniques like data compression, decompression and conversion. Ghostscript can also be used as language interpreter and raster image processor. Ghostscript runs on Mac OS, Windows, OS/2, and Unix-like systems.