Ha. OK. Well, at least you didn't go into how the switch has discrete states. Thanks for the replies. I do agree that it should probably have a microprocessor to be truely called "digital." My first thought was that there are digital circuits that don't involve micros, so that's why I said "at least one gate." But a gate could be just a couple transistors.... and so then "digital" comes to mean just anything that has discrete states, which even a "analog" circuit may have. Slippery slope. That's when I became afraid that you'd bring up the switch. hahahah