Memory And The Memory Menu; Storing And Recalling Numbers; Reverse Polish Notation (Rpn) Mode - HP 30b - Business Professional Calculator Quick Start Manual

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,
:t < >
press . 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.
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Pressing 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-
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firm your choice. At the Del.Data? or Del.CF? prompts, press to con-
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firm, or 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
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number later on, press followed by the memory number. When a memory
item is displayed, you can key in a new number and modify the value of the
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memory by pressing .

Reverse Polish Notation (RPN) Mode

The following information is a brief overview of how RPN works. In RPN
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mode, numbers are entered first, separated by pressing , followed
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