High quality, device independent graphic display language and the industry-standard printing and imaging technology from Adobe.

http://www.adobe.com/products/postscript/main.html

The original NeXT system used DisplayPostScript (DPS), providing all of the power of PostScript, but for interactive display. In the OldDays, you could upload PostScript code into the DPS system.

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PostScript Applications

HyperJeff’s OS X Links, search for PostScript http://osx.hyperjeff.net/Apps/

GhostScript http://www.cs.wisc.edu/~ghost/

MacGhostView http://www.kiffe.com/macghostview.html

TeXShop (uses GhostScript) http://www.uoregon.edu/~koch/texshop/texshop.html