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PostScript is a page description language used primarily in the electronic and desktop publishing industries. It was developed by Adobe Systems and introduced in 1985, alongside their PostScript-enabled laser printers. The language operates with high-quality graphics, text, and images for printing. PostScript is both an interpreted programming language as well as a common vector image format. Printer firmware interprets the PostScript code to render pages accurately, making it possible to describe complex elements on a page such as shading, halftones, fonts or line art with mathematical precision.