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APF M74 (MARK 74)

APF M74
Image: Joe Haupt, CC BY-SA 2.0

The APF M74 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 6 functions, 24 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is PP3 9V. The calculator was manufactured in Singapore.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions6
Keys24
Precision8
LogicAlgebraic
Display typeLED
Length135mm
Width72mm
Thickness23mm
Weight86g
Power SourcePP3 9V
CountrySingapore
Year introduced1979
Year discontinued1979

Replacements:

If you have an APF M74 that is no longer working, you can first try replacing the PP3 9V battery. 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 APF