HP-35

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.

This article is about the first HP pocket calculator. For the calculator introduced in 2007, see HP 35s. For the pistol, see Browning Hi-Power.

HP-35
HP-35 (1st version)
scientific electronic pocket calculator.
TypeScientific
Introduced1972
Discontinued1975
Calculator
Entry modeRPN
Display typeRed LED seven-segment display
Display size15 digits (decimal point uses one digit), (±10±99)
Programming
Memory registerFour-register operational stack with one memory register.
Other
Power supplyInternal rechargeable battery or 115/230 V AC, 5 W
WeightCalculator: 9 oz (260 g),
recharger: 5 oz (140 g)
DimensionsLength: 5.8 inches (150 mm),
width: 3.2 inches (81 mm),
height: 0.7–1.3 inches (18–33 mm)
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