HP 50g Graphing Calculator - Manual (Page 42)

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Press the !!@@OK#@ soft menu key to return to normal display. Examples of selecting
different calculator modes are shown next.
Operating Mode
The calculator offers two operating modes: the Algebraic mode, and the
Reverse Polish Notation (RPN) mode. The default mode is the Algebraic mode
(as indicated in the figure above), however, users of earlier HP calculators may
be more familiar with the RPN mode.
To select an operating mode, first open the CALCULATOR MODES input form
by pressing the H button. The Operating Mode field will be highlighted.
Select the Algebraic or RPN operating mode by either using the \ key
(second from left in the fifth row from the keyboard bottom), or pressing the
@CHOOS soft menu key. If using the latter approach, use up and down arrow
keys, — ˜, to select the mode, and press the
!!@@OK#@ soft menu key to
complete the operation.
To illustrate the difference between these two operating modes we will calculate
the following expression in both modes:
5 . 2
3
23
3 3
1
5 3
e +
⋅
− ⋅ ⎟
⎠
⎞
⎜
⎝
⎛