Adobe's new Red Book "PostScript Language Reference Book" (1999) supersedes all the material about LanguageLevel 3 in the 3010 Supplement. Hardcopy book published by Addison-Wesley. See also here. Alternate URL for the PDF file. Another URL for the PDF file. And another one.

EXTERNAL LINKS
Adobe's Red Book (PostScript Language Reference)
Google search page

INTERNAL LINKS
PostScript: the language ⦿

Luc Devroye ⦿ School of Computer Science ⦿ McGill University Montreal, Canada H3A 2K6 ⦿ lucdevroye@gmail.com ⦿ http://luc.devroye.org ⦿ http://luc.devroye.org/fonts.html