Vernon Wright wrote:
NonLinear Systems was an electronics test tool builder in Solana Beach, CA ('bout
half an hour north of San Diego). I don't recall when it was formed by Andrew Kay
(probably the 50's or even earlier), but it created the first digital voltmeter in the
early 60's. It was a very inventive company.
The radio museum here received one of what I believe was that first DVM from
NLS (circa mid-50's), something of an historic model.
It disappeared before I had a chance to look at in depth or work on it.