calculator.org

the calculator home page

APF MARK 50 (Scientific Calculator)

APF MARK 50
Image: Joe Haupt, CC BY-SA 2.0

The APF MARK 50 is a scientific calculator with 8 digits precision and algebraic logic. It has 17 functions, 19 keys, and a VFD (vacuum fluorescent) display. The power source is PP3 9V. The calculator was manufactured in Japan. Note: Montgomery Ward P330

Facts at a glance:

FeatureValue
TypeScientific
Functions17
Keys19
Precision8
LogicAlgebraic
Display typeVFD
Length140mm
Width76mm
Thickness27mm
Weight165g
Power SourcePP3 9V
CountryJapan
Year introduced1975

Replacements:

If you have an APF MARK 50 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 model as a replacement:

See other calculators by APF