daemon book

n. The Design and Implementation of the 4.3BSD UNIX Operating System , by
Samuel J. Leffler, Marshall Kirk McKusick, Michael J. Karels, and John S.
Quarterman (Addison-Wesley Publishers, 1989, ISBN 0-201-06196-1); or The
Design and Implementation of the 4.4 BSD Operating System by Marshall Kirk
McKusick, Keith Bostic, Michael J. Karels and John S. Quarterman
(Addison-Wesley Longman, 1996, ISBN 0-201-54979-4) Either of the standard
reference books on the internals of BSD Unix. So called because the covers
have a picture depicting a little demon (a visual play on daemon ) in
sneakers, holding a pitchfork (referring to one of the characteristic
features of Unix, the fork (2) system call).

