Any of several series of technical manuals distinguished by cover colour. The original rainbow series was the NCSC security manuals (see Orange Book, {crayola books}) the term has also been commonly applied to the PostScript reference set (see Red Book, Green Book, {Blue Book}, {White Book}). Which books are meant by ""the" rainbow series" unqualified is thus dependent on one' s local technical culture. [Jargon File] (1996-12-03)
