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MBO Delta 40

The MBO Delta 40 is a scientific calculator with 8 digits precision and algebraic logic. It has 28 functions, 38 keys, and a VFD (vacuum fluorescent) display. The power source is 2xAA.

Facts at a glance:

FeatureValue
TypeScientific
Functions28
Keys38
Precision8
LogicAlgebraic
Display typeVFD
Power Source2xAA
Year introduced1975

Replacements:

If you have a MBO Delta 40 that is no longer working, you can first try replacing the 2xAA batteries. 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 MBO