There were American SN7400s in 1974 of course, but they were expensive compared to single transistors. I also remember the Finnish Parliament voting machine, ma

There were American SN7400s in 1974 of course, but they were expensive compared to single transistors. I also remember the Finnish Parliament voting machine, made with transistors and relays around 1968. It was huge incomprehensible mess on hand-wired breadboards. It was easier to make totally new one with microprocessors and printed circuits.