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HP 30b - Business Professional Calculator - Memory and the Memory Menu; Storing and Recalling Numbers; Reverse Polish Notation (RPN) Mode

HP 30b - Business Professional Calculator
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Getting Started 11
Memory and the Memory Menu
The Memory menu contains the following items: memories 1–9 (Mem 1–9)
and 0 (Mem 0), Cash Flow, Statistics (Stats), and Memory. To enter the menu,
press
:t. Press < or > repeatedly to scroll through the
items starting with memory 1 (Mem 1).
The Cash Flow and Statistics menus share the same memory and are limited
to a combined total of 50 memory slots. The number displayed with Memory
refers to the number of remaining memory slots. When the cash flow or
statistics items are displayed, a number also appears on the bottom line. This
number indicates the number of memory slots used by the menu.
Pressing
I with this number displayed resets the memory of the dis-
played menu item and erases all entered data. Since entering data in these
menus can represent a significant amount of work, you will be asked to con-
firm your choice. At the Del.Data? or Del.CF? prompts, press
I to con-
firm, or
O to cancel.
Storing and Recalling Numbers
To store a number in the display, press :$, followed by the number of
the memory in which you wish to store that number, (1-9, or 0). To recall the
number later on, press
L followed by the memory number. When a memory
item is displayed, you can key in a new number and modify the value of the
memory by pressing
I.
Reverse Polish Notation (RPN) Mode
The following information is a brief overview of how RPN works. In RPN
mode, numbers are entered first, separated by pressing
I, followed

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