page_title: HP-35
hierarchical_section_title: HP-35
caption_attribution_description: English: This HP 35 was the first scientific pocket calculator and was introduced in 1972. The first production run had a small red dot to the right of the on/off switch that would show when the calculator was turned on and did not have the "35" designation on the label.
context_page_description: The HP-35 was Hewlett-Packard's first pocket calculator and the world's first scientific pocket calculator: a calculator with trigonometric and exponential functions. It was introduced in 1972.
context_section_description: The HP-35 was Hewlett-Packard's first pocket calculator and the world's first scientific pocket calculator: a calculator with trigonometric and exponential functions. It was introduced in 1972.
caption: HP-35 (1st version)
  scientific electronic pocket calculator.
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