Probably created by accident, but can someone please post basic info?

http://developer.apple.com/documentation/Cocoa/Reference/ApplicationKit/Objc_classic/Classes/NSPrinter.html

NSPrinter is one of those crufty semi-useful classes that hasn’t changed much since OpenStep. Be careful how you use it, since I’ve seen it return totally wrong information in the past. (Although, admittedly, I haven’t done much with it lately.)