When we buy new device such as HP 9s Scientific we often through away most of the documentation but the warranty.
Very often issues with HP 9s Scientific begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Calculator HP 9s Scientific is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Calculator on our side using links below.