= D =
Used to describe equipment that is
non-functional and halfway expected to remain so, especially
obsolete equipment kept around for political reasons or ostensibly
as a backup. "When we get another Wyse-50 in here, that ADM 3
will turn into a doorstop." Compare boat anchor.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.