art wrote:

...
Washington and NASA and other institutions.
Art

My mother 78+ has trouble with her cell phone ... I shudder at teaching
her the ins-and-outs of a programmable calculator ... long hand
calculations take time.

Some are stuck with antenna modeling programs ... indeed, a tribute to
them for mastering those. The world will not change at a snap of your
fingers.

I have a smith chart program, that is enough for me--Cecil does it by hand!

Regards,
JS