On the left, the NEC TK 80 kit, based on Intel 8080 chip, on the centre, Busicom calculator motherboard, based on Intel 4004 chip, and on the right, the Busicom calculator, fully assembled in Ueno, Tokyo.
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Captions
NEC TK-80 kit, Intel i4004 microprocessor, and Busicom calculator, on display at the National Museum of Nature and Science, Ueno, Tokyo