HP 15C Manuel d'utilisateur télécharger pdf (Page 32)

Section 3

The Automatic Memory Stack,

LAST X, and Data Storage

The Automatic Memory Stack

and Stack Manipulation

HP operating logic is based on a mathematical logic known as 

        ukasiewicz

(Wookashye'veech) (1878-1956). Conventional algebraic notation places the

algebraic operators between the relevant numbers or variables when

evaluating algebraic expressions.    

operators before the variables. For optimal efficiency of calculator use, HP

applied the convention of specifying (entering) the operators after

specifying (entering) the variable(s). Hence the term "Reverse Polish

Notation" (RPN).

The HP-15C uses RPN to solve complicated calculations in a

straightforward manner, without parentheses or punctuation. It does so by

automatically retaining and returning intermediate results. This system is

implemented through the automatic memory stack and the v key,

minimizing total keystrokes.

The Automatic

Memory Stack Registers

0.0000

Always displayed

When the HP-15C is in Run mode (no PRGM annunciator displayed), the

number that appears in the display is the number in the X-register.

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 287 288

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HP 15C Manuel d'utilisateur Page 32