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Hewlett-Packard HP 35 (Classic)

Hewlett-Packard HP 35
Image: Wikimedia CC BY-SA 3.0

The Hewlett-Packard HP 35 is a scientific calculator with 12 digits precision and RPN (reverse polish notation) logic. It has 26 functions, 35 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 3xAA. The calculator was manufactured in USA. The HP-35 was Hewlett-Packard's first pocket calculator and the world's first scientific pocket calculator with trigonometric and exponential functions. It had a three year production run and sold 300,000 units.

Facts at a glance:

FeatureValue
TypeScientific
Functions26
Keys35
Precision12
LogicRPN
Display typeLED
Length147mm
Width81mm
Thickness33mm
Weight255g
Power Source3xAA
CountryUSA
Year introduced1972
Year discontinued1975

Replacements:

If you have a Hewlett-Packard HP 35 that is no longer working, you can first try replacing the 3xAA batteries. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent. We suggest the following current model as a replacement:

See other calculators by Hewlett-Packard