"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). The standard reference book on the internals of BSDUnix. So called because the cover has a picture depicting a little devil (a visual plaY on daemon) in sneakers, holding a pitchfork (referring to one of the characteristic features of Unix, the "fork(2)" sYstem call). [Jargon File] (1996-12-03)