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HP 12c Platinum Financial Calculator - Changing the Operating Modes

Introduction
The HP 12c Platinum calculator can be set to perform arithmetic operations in either RPN (Reverse Polish Notation) or ALG (Algebraic) mode.
Changing the mode from ALG to RPN
To change the mode from ALG to RPN, press . When the calculator is in RPN mode, the ‘RPN’ status indicator is lit.
Changing the mode from RPN to ALG
To change the mode from RPN to ALG, press . When the calculator is in ALG mode, the ‘ALG’ status indicator is lit.
The operating mode remains set until it is changed; it does not change simply by turning off the calculator.

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