I was unaware of this historical precedent for the extended assignment operators in C/C++. I don't know how much further it goes back; this calculator is from 1969.pic.twitter.com/TVAm5frkCC
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Here are some Victor/Friden calculators from the 1960s. And here’s another one: https://americanhistory.si.edu/collections/search/object/nmah_334770 …pic.twitter.com/ahssxlMgNa
And an older, electric machine, if you want to stretch it a bit.pic.twitter.com/VzHwkiVnQz
Yes, but "×=" "÷=" "=+" and "=-" are all relevant too.
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