"Tyrotek" analog computer

From: hilpert at cs.ubc.ca I'm currently working on refurbishing a small analog computer from the mid-60's. It has the name "Tyrotek" on the front panel, in the middle of a sine wave curve. (My) web searches turn up zippo about this name (other than some guy using the word as a moniker). The only other clue to a manufacturer is "Non Linear Mfg." in the foil of the printed circuit boards. No model number, no identification plate. While it is smaller for an analog computer and appears to be intended as an educational or training unit, it is built to industrial standards, with a nice sizeable plugboard using standard IBM plugboard wires, fiberglass PCBs, discrete FET-input op-amps, etc., so it's not just some gimmicky thing. Eventually I'll have a web page for it, but right now I'm curious as to it's manufacturer origins. Just a guess, but one line of speculation I'm making is that "Non Linear Mfg." may have been the manufacturing arm of Non-Linear Systems of digital voltmeter fame, and Tyrotek was a subsidiary of, or otherwise associated, with NLS.