dup loop = D = DWIM

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.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.

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