Google is your friend. ISM is Industrial, Scientific, Medical and Zigbee is
a proprietary form of spread spectrum modulation.

Google may be my friend, but I guess I need a best buddy. I know about
acronymfinder.com and a few others (and had already been there), but
given "Industrial, Scientific, Medical" as a possibility, I would not
have thought it applied here (i.e. as opposed to Bluetooth).

Once asking about ISM, why not ask about Zigbee? (does it replace
Bluetooth?)

Jose
--
There are two kinds of people in the world. Those that just want to
know what button to push, and those that want to know what happens when
they push the button.
for Email, make the obvious change in the address.