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Aristo R4000

The Aristo R4000 is an arithmetic calculator with 10 digits precision and algebraic logic. It has 8 functions, 25 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions8
Keys25
Precision10
LogicAlgebraic
Display typeVFD
Power Source2xAA
Year introduced1975

Replacements:

If you have an Aristo R4000 that is no longer working, you can first try replacing the 2xAA batteries. 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 Aristo