:dup killer: /d[y]oop kill'r/ /n./ [FidoNet] Software that is
supposed to detect and delete duplicates of a message that may have
reached the FidoNet system via different routes.

:dup loop: /d[y]oop loop/ (also `dupe loop') /n./ [FidoNet]
An infinite stream of duplicated, near-identical messages on a
FidoNet {echo}, the only difference being unique or mangled
identification information applied by a faulty or incorrectly
configured system or network gateway, thus rendering {dup
killer}s ineffective. If such a duplicate message eventually
reaches a system through which it has already passed (with the
original identification information), all systems passed on the way
back to that system are said to be involved in a {dup loop}.

:dusty deck: /n./ Old software (especially applications) which
one is obliged to remain compatible with, or to maintain ({DP}
types call this `legacy code', a term hackers consider smarmy and
excessively reverent). The term implies that the software in
question is a holdover from card-punch days. Used esp. when
referring to old scientific and {number-crunching} software,
much of which was written in FORTRAN and very poorly documented but
is believed to be too expensive to replace. See {fossil};
compare {crawling horror}.

:DWIM: /dwim/ [acronym, `Do What I Mean'] 1. /adj./ Able to
guess, sometimes even correctly, the result intended when bogus
input was provided. 2. /n. obs./ The BBNLISP/INTERLISP function
that
attempted to accomplish this feat by correcting many of the more
common errors. See {hairy}. 3. Occasionally, an interjection