In the early 1970s the slide rule was still standard fare and the personal computer was a vision of the future. Then, in 1972, HP introduced the world’s first scientific pocket calculator – the HP-35 – and delivered portable “computing power” into the hands of users. An instant hit among scientists and engineers, the HP-35 soon displaced many a slide rule and marked the birthplace of HP’s innovative and successful heritage in the handheld calculator market.
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