Since PostScript is not just a picture-description language, but in fact a complete programming language, one needs a complete PostScript interpreter to convert or display a PostScript graphic. Numerous PostScript interpreter clones, both commercial and free, are available for other machines. Not all clone interpreters know how to handle Adobe's encrypted Type 1 fonts, and some have other incompatibilities. Clone interpreters will not have Adobe's proprietary rendering technology which interprets font hints to improve the appearance of fonts shown at small sizes on low-resolution devices. Ghostscript, a freeware product associated with the GNU project, is available for PC's, Sun's, X servers, and other architectures.
Source is included.
Or they can print postscript on any raster printer using the NeWSPrint product which uses the same PostScript interpreter found in OpenWindows. Adobe has written numerous manuals, sometimes referred to by PostScript gurus by the color of the cover. These books are published by Addison-Wesley. Mastering Adobe Illustrator 88, Deke McClelland, Craig Danuloff Publishing Resources Inc.-Dow Jones Irwin 1989. Use the Font Foundary program included with the font.