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Commodore 9R-31

The Commodore 9R-31 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 13 functions, 31 keys, and a VFD (vacuum fluorescent) display. The power source is Sealed battery pack.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions13
Keys31
Precision8
LogicAlgebraic
Display typeVFD
Length140mm
Width76mm
Power SourceSealed battery pack
Year introduced1975

Replacements:

If you have a Commodore 9R-31 that is no longer working, you can consider replacing the calculator with a modern equivalent. We suggest the following current models as possible replacements:

See other calculators by Commodore