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Royal Digital IV

The Royal Digital IV is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 18 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is 6xAA sealed. Note: Uses circuit board contacts and electrical stylus, like the Stylophone electronic organ.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions5
Keys18
Precision8
LogicAlgebraic
Display typeLED
Length165mm
Width81mm
Thickness39mm
Power Consumption1.800000W
Power Source6xAA sealed
Year introduced1972
Year discontinued1972

Replacements:

If you have a Royal Digital IV that is no longer working, you can first try replacing the 6xAA sealed 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 Royal