Interesting responses regarding the Arial warning I posted. As I wrote
Shirley, it was Adobe tech support that told me Arial was supplied with
Macs, which makes all the more frightening Adobe's decision to disallow
it's embedding. Some other points I'd like to add to the discussion, in
response to your kind responses:

1) Helvetica did not look acceptable as a basic text font when I was
testing fonts. The worst offense was that two lower-case "Ls" next to each
other, as in the word "illusion", rendered at different widths on the
Windows machines here. There were other examples guaranteed to slow read
time.

2) I looked at over 20 sans serif fonts (research has shown sans serif to
be more readable onscreen, the opposite from the on-paper situation) before
learning that Arial rendered the cleanest on the Macs and PC-clones of
various ages and configurations around here. I cannot recommend Helvetica
or Times, two of the fonts others suggested, for that reason. However,
everyone here uses Word, so even Mac-users would have Arial installed, and
thus my experience cannot be universally applied.

3) I was aware of the problems in using TrueType fonts, but after careful
research I determined that the problems were only reported by people using
PostScript and Distiller, which makes sense given the nature of the
problems. This is FrameMaker's intended route to PDF, but other weaknesses
in their process led to me to ditch it and stick with PDF Writer. So far,
no customer has reported problems with the other TrueType fonts I use,
which are embedded.

As always, my thanks for your help.

Best regards,
Jim