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Caudax

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What are the others? - AUX CON PRN NUL etc

The only ones I know are:

AUX CON PRN and NUL

Could anybody here please state the others.
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graye
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Done?           - The other what?  :)

dir
err
stdin|stdout
out
lpt
>
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Those keywords you mentioned are system devices.  The list will vary depending an what is installed on your machine.  You can use all of the previously mentioned ones plus any other ports or devices supported on your machine. The only one that springs to mind to add to the list are the terminal ones - TTY1, TTY2, etc.  It really does depend on what your machine has.
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Early versions of DOS had support for PUN: - a punched tape device!
Can I just add to my previous comment?

SunBow's comment (the one above mine) isn't correct.  None of those keywords mentioned are devices available in DOS.  They're keywords more commonly associated with C or Pascal programming languages.
I think I answered it.
as did graye.  

msd will list the devices as TSR's could install their own.
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Caudax

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This is bizarre. I cannot split points therefore I will give graye the points.
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ASKER

...

I believe the fact that I could not split the points are because I only had 20 points there. Ah well... at any rate, thanks.

My apologies for not awarding points earlier.