IBM-604

https://ed-thelen.org/comp-hist/IBM-604.html

Instructor of 'Electronics Fundamentals' [2nd Phase - from AC & DC Circuit Analysis, through motors, generators, power supplies and filter ckts, vacuum tubes, amplifiers, oscillat

RTTY Teletype

http://radioblvd.com/rtty_teletype.htm

a company called RTTY Electronics in the California SF Bay Area back on May 14, 1974 - over 45 years ago. RTTY Electronics is still in business in El Sobrante, CA and its owner, P

That's everything I could find.
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