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Novus 650 (mathmate ; mathbox)

Novus 650
Image: Joe Haupt, CC BY-SA 2.0

The Novus 650 is an arithmetic calculator with 6 digits precision and RPN (reverse polish notation) logic. It has 4 functions, 15 keys, and an LED (light-emitting diode) display, typical of calculators of this era. The power source is PP3 9V.

Facts at a glance:

FeatureValue
TypeArithmetic
Functions4
Keys15
Precision6
LogicRPN
Display typeLED
Length127mm
Width70mm
Thickness23mm
Power SourcePP3 9V
Original price$16
Year introduced1975

Replacements:

If you have a Novus 650 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 Novus