Green Book: n. 1. One of the three standard {{PostScript}} references:

:Green Book: n. 1. One of the three standard {{PostScript}}
references: "PostScript Language Program Design", bylined
`Adobe Systems' (Addison-Wesley, 1988; QA76.73.P67P66 ISBN
0-201-14396-8); see also {Red Book}, {Blue Book}, and the
{White Book} (sense 2). 2. Informal name for one of the three
standard references on SmallTalk: "Smalltalk-80: Bits of
History, Words of Advice", by Glenn Krasner (Addison-Wesley, 1983;
QA76.8.S635S58; ISBN 0-201-11669-3) (this, too, is associated with
blue and red books). 3. The "X/Open Compatibility Guide", which
defines an international standard {{UNIX}} environment that is a
proper superset of POSIX/SVID; also includes descriptions of a
standard utility toolkit, systems administrations features, and the
like. This grimoire is taken with particular seriousness in
Europe. See {Purple Book}. 4. The IEEE 1003.1 POSIX Operating
Systems Interface standard has been dubbed "The Ugly Green
Book". 5. Any of the 1992 standards issued by the CCITT's tenth
plenary assembly. These include, among other things, the
X.400 email standard and the Group 1 through 4 fax standards. See
also {{book titles}}.
-- The AI Hackers Dictionary