Long before we were debating the merits of Android Wear and the rumored iWatch, companies were experimenting with quartz technology, LEDs, and miniaturized circuits to create the ancestors of the modern wearable. HP — which made some of the most important calculators back when calculators were a big deal — pitched in with the HP-01, a busy hunk of metal that took the crown as the worlds first calculator watch (long before the days of the Casio you might have in your desk drawer).
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