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Imperial 90K

The Imperial 90K is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 19 keys, and a VFD (vacuum fluorescent) display. The power source is 4xAAA.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys19
Precision8
LogicAlgebraic
Display typeVFD
Length120mm
Width73mm
Thickness20mm
Weight118g
Power Source4xAAA
Year introduced1975
Year discontinued1975

Replacements:

If you have an Imperial 90K that is no longer working, you can first try replacing the 4xAAA 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 Imperial