![]() With version 8.54 in 2006, both development branches were merged again, and dual-licensed releases were still provided. Later, Deutsch formed Aladdin Enterprises to dual-license Ghostscript also under a proprietary license with an own development fork: Aladdin Ghostscript under the Aladdin Free Public License (which, despite the name, is not a free software license, as it forbids commercial distribution) and GNU Ghostscript distributed with the GNU General Public License. At the time of the initial release there was a similar commercial software product named GoScript from LaserGo. Peter Deutsch for the GNU Project, and released under the GNU General Public License in 1988. Ghostscript has been ported to many operating systems, including Unix-like systems, classic Mac OS, OpenVMS, Microsoft Windows, Plan 9, MS-DOS, FreeDOS, OS/2, ArcaOS, Atari TOS, RISC OS and AmigaOS. As it takes the form of a language interpreter, Ghostscript can also be used as a general purpose programming environment. Ghostscript can also serve as the back-end for PDF to raster image (png, tiff, jpeg, etc.) converter this is often combined with a PostScript printer driver in " virtual printer" PDF creators. The ps2pdf conversion program comes with the Ghostscript distribution. ![]() It can also be used as a file format converter, such as PostScript to PDF converter. Ghostscript can be used as a raster image processor (RIP) for raster computer printers-for instance, as an input filter of line printer daemon-or as the RIP engine behind PostScript and PDF viewers. Its main purposes are the rasterization or rendering of such page description language files, for the display or printing of document pages, and the conversion between PostScript and PDF files. Ghostscript is a suite of software based on an interpreter for Adobe Systems' PostScript and Portable Document Format (PDF) page description languages. Dual-licensed ( GNU Affero General Public License + commercial permissive exception)
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