rainbow series

rainbow series n.  Any of several series of technical
   manuals distinguished by cover color.  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.