Ted asks:
> Why does changing a permanent file to temporary (e.g. FCLOSE with a
> disposition of 5) require PM cap?

Because it's the only thing stopping you from stealing a file you don't
own.

Try:

FOPEN EDITOR.PUB.SYS for read access (anyone can do this).
FCLOSE disp=5 (will require PM).

*poof*

EDITOR.PUB.SYS is now gone and is a temporary file.  You can do a :SAVE
or another FOPEN/FCLOSE to turn it into a local permanent file if you
like.  If it didn't require PM, then anyone who could open a file could
remove it.

This was a cute way to rename files across accounts before there was
POSIX.

G.