Ah, PostScript. Yes, people mostly use it to print stuff on monochrome 
laser printers. But when you actually dig into it, it actually supports 
some pretty crazy stuff.

CIE colour specifications.

Spot colours.

Seperations.

Trappings.

Automatic tray selection.

You can even select whether the paper comes out face-down or face-up.

Obviously, very few devices *support* this stuff... (I would imagine you 
only care spot colours and trappings if you're doing industrial-grade 
printing.) But it's pretty crazy that it's in there, all the same.

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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