[rescue] [vcf-midatlantic] vacuum tube computers

[Dave McGuire]

I'll throw in another example: volume knobs. Many (most?) car
stereos still have knobs you turn to adjust the volume.

They may no longer be analog. My wifes car volume control knob seems
to change
in discrete steps so we have the choice of a little too soft or a
little too
loud due to the step size.

They haven't been analog for a very long time.

Zoinks! Foiled again!

Yep. In fact, that change may be a very good construct for teaching
the difference between digital (discrete systems) and analog (continuous
systems).

-Dave