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RES Mark IX

The RES Mark IX is an arithmetic calculator with 8 digits precision and algebraic logic. It has 7 functions, 20 keys, and a VFD (vacuum fluorescent) display. The power source is Sealed battery pack. Note: Regan Industries RA900P

Facts at a glance:

FeatureValue
TypeArithmetic
Functions7
Keys20
Precision8
LogicAlgebraic
Display typeVFD
Length140mm
Width89mm
Power SourceSealed battery pack
Year introduced1972

Replacements:

If you have a RES Mark IX 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 RES