Ben Greenfield posted: "I’m doing some research on North American Aviation/Autonetics artifacts and while researching simply Metal Oxide Semiconductor or MOS." He pointed to some photos of some NAA objects with labels "Autonetics MOS/SOS" from Rockwell/Autonetics. Apparent dates 1968 or so. My interest is in COSMOS products from RCA, particularly the 1802 COSMAC microprocessor. A Web search of my site will be informative about that. RCA produced an LSI chip-pair version later known as the 1801, sometime in 1975; followed by the 1802 single-chip. But RCA produced SOS (Silicon on Sapphire) COS (complimentary silicon) logic in the early 1970's and possibly earlier. I've not traced the history of RCA's CMOS work but it's likely of the same era as the Autonetics/Rockwell work. Ben, I don't know your goals or interests. But if I were researching this, I'd look back at the electronic trade journals and the IEEE conference journals of the period. Those would have names and dates and products and prototypes and functionality. I'd like to be told, if RCA's CMOS work was preceded by work from Rockwell slash Autonetics; or if there's some relationship. Another subtext appears to be "the first microprocessor". I'm not overly interested in arguing "firsts", or arguing ABOUT arguing "firsts". The RCA COSMAC 1802 is interesting for many reasons. herb johnson -- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net