[TUHS] daemons are not to be exorcised

[clemc@ccc.com (Clem Cole)]

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On Tue, Mar 20, 2018 at 2:24 PM, Bakul Shah <bakul at bitblocks.com> wrote:

> On Tue, 20 Mar 2018 14:04:38 -0400 Dan Cross <crossd at gmail.com> wrote:
> Dan Cross writes:
> >
> > On Tue, Mar 20, 2018 at 1:56 PM, George Michaelson <ggm at algebras.org>
> wrote:
> >
> > I think daemon/demon came from printers demon, which is carved into
> > > the government printing office in Brisbane. the printers demon is the
> > > one which stuffed up letters in the tray, to make printers tear their
> > > hair out. Did I say tray? I meant case, upper case, the one above,
> > > with the big letters, and lower case, the case with the little
> > > letters. oh dear. really? is that why they are cases?
> > >
> >
> > While this story (and the others I trimmed for brevity) is (are) great,
> > "daemon" is actually from the Greek, I believe: an intermediary between
> > humans (users) and the gods (the kernel).
>
> From http://ei.cs.vt.edu/~history/Daemon.html
>
>   Fernando J. Corbato: ... Our use of the word daemon (@
>   Project MAC in 1963) was inspired by the Maxwell's daemon of
>   physics and thermodynamics. (My background is Physics.)
>   Maxwell's daemon was an imaginary agent which helped sort
>   molecules of different speeds and worked tirelessly in the
>   background. We fancifully began to use the word daemon to
>   describe background processes which worked tirelessly to
> ​​
>
>   perform system chores.
>


​Right -- that is what I was under the impression from where the term came
for computer use.   Although, I was also under  the impression that Maxwell
had taken the term from ideas from some his Cambridge colleagues that were
working on human thought and described the ideas of these daemons running
around in your head supporting things like vision, hearing and your other
senses.   The later was formalized I believe years later by Oliver
Suthridge (IIRC my Cog Psych of many years ago) - into the something like
the Pandemonium model of cognition.

i.e. I think the term was used first in Cognition, then to Physics and
finally to Computers.

As for Paul's comment about the daemons.  Yes, Kirk McKusick who actually
drew the original BSD daemon with purple sneakers, was wearing the infamous
blue tee with said logo out walking on the street, as one someone else in
the party (maybe Sam Leffler) sporting a 10 anniversary USENIX shirt in San
Antonio many years ago, which has the daemons shown top of a PDP-11 with
pipes, the null device, *et al*.   He has quite a tale of the experience.

Clem





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