The last time I saw that one was in the University of British Columbia 7044 machine room, circa 1969. It was part of an “Anatomy of a Computer” cartoon, with a number of other visual puns. The adder is the only one I remember. Have never seen it online, alas.

Interestingly, looking around for this cartoon led me to these two specimens showing adders in chip and circuit design: https://micro.magnet.fsu.edu/creatures/pages/fulladder.html https://micro.magnet.fsu.edu/creatures/pages/halfadder.html