First Handheld Calculator

Today in 1972, the HP-35 was introduced. The world’s first handheld-sized scientific calculator, ultimately made the slide rule, which had previously been used by generations of engineers and scientists, obsolete. The HP-35 was 5.8 inches (150 mm) long and 3.2 inches (81 mm) wide, said to have been designed to fit into one of William Hewlett’s shirt pockets.

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I launched the Big Data conversation; writing, research, marketing services; http://whatsthebigdata.com/ & https://infostory.com/
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