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National Semiconductor 4525 (Scientist PR)

The National Semiconductor 4525 is a programmable calculator with 8 digits precision and RPN (reverse polish notation) logic. It has 20 functions, 39 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is 3xAAA sealed. Note: Novus 4525 Scientist PR

Facts at a glance:

FeatureValue
TypeProgrammable
Functions20
Keys39
Precision8
LogicRPN
Display typeLED
Length150mm
Width75mm
Thickness31mm
Power Source3xAAA sealed
Year introduced1975

Replacements:

If you have a National Semiconductor 4525 that is no longer working, you can first try replacing the 3xAAA sealed 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 National Semiconductor