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The worlds first handheld scientific calculator

On February 1, 1972 just a day before a year was completed from the official go-ahead for the product HP-35 was made available to the world. Now recognised as the worlds first scientific pocket calculator, the gadget revolutionised the way we looked at handheld equipment. A.S.Ganesh punches some keys to give you the tale of these number crunchers

1 Feb 2026 11:24 am