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 {BSD} Unix. 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). Also known as the {Devil Book}.

:dahmum: /dah'mum/ /n./ [Usenet] The material of which
protracted {flame war}s, especially those about operating
systems, is composed. Homeomorphic to {spam}. The term
`dahmum' is derived from the name of a militant {OS/2}
advocate, and originated when an extensively crossposted
OS/2-versus-{Linux} debate was fed through {Dissociated
Press}.

:dangling pointer: /n./ A reference that doesn't actually lead
anywhere (in C and some other languages, a pointer that doesn't
actually point at anything valid). Usually this happens because it
formerly pointed to something that has moved or disappeared. Used
as jargon in a generalization of its techspeak meaning; for
example, a local phone number for a person who has since moved to
the other coast is a dangling pointer. Compare {dead link}.

:dark-side hacker: /n./ A criminal or malicious hacker; a
{cracker}. From George Lucas's Darth Vader, "seduced by the
dark side of the Force". The implication that hackers form a sort
of elite of technological Jedi Knights is intended. Oppose
{samurai}.