https://www.dallasnews.com/business/texas-instruments/2019/03/05/jerry-merryman-one-three-inventors-texas-instruments-calculator-dies-86
"It was late 1965 and Jack Kilby, my boss, presented the idea of a calculator. He called some people in his office. He says, we'd like to have some sort of computing device, perhaps to replace the slide rule. It would be nice if it were as small as this little book that I have in my hand."