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National Semiconductor 500 (NS500)

National Semiconductor 500
Image: Joe Haupt, CC BY-SA 2.0

The National Semiconductor 500 is an arithmetic calculator with 12 digits precision and algebraic logic. It has 5 functions, 26 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAA sealed.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys26
Precision12
LogicAlgebraic
Display typeVFD
PrinterYes
Length168mm
Width72mm
Thickness37mm
Power Consumption2.500000W
Power Source4xAA sealed
Year introduced1979
Year discontinued1981

Replacements:

If you have a National Semiconductor 500 that is no longer working, you can first try replacing the 4xAA sealed. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.

We suggest the following current models as possible replacements:

See other calculators by National Semiconductor