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dragon n.
[MIT] A program similar to a daemon, except
that it is not invoked at all, but is instead used by the system to
perform various secondary tasks. A typical example would be an
accounting program, which keeps track of who is logged in,
accumulates load-average statistics, etc. Under ITS, many
terminals displayed a list of people logged in, where they were,
what they were running, etc., along with some random picture (such
as a unicorn, Snoopy, or the Enterprise), which was generated by
the `name dragon'. Usage: rare outside MIT -- under Unix and most
other OSes this would be called a `background demon' or
daemon. The best-known Unix example of a dragon is
cron(1). At SAIL, they called this sort of thing a
`phantom'.
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