HP 20b Calculator Quick Start Guide

Basic Features
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are working in the Bond menu and you wish to reset all your entries in the Bond
menu. From anywhere in the Bond menu, press :x. Bond displays on
screen. At this prompt, pressing I resets the Bond menu and returns you
to the last item you were working with in the Bond menu.
Notes about Special Menus
The Mode, Memory, Math and Reset menus are special menus, because when
you exit them by pressing O, you return to the previous menu (if any). This
feature allows you to work in two or more menus simultaneously without having to
exit a menu and lose your work.
Memory
The Cash Flow and Statistics menus share the same memory and are limited to a
combined total of 50 memory slots.
Macros can record up to 120 keys.
Since entering data in menus can represent a significant amount of work, when
the reset commands for the macro, cash flows, statistics and delete all ( Del.All? )
functions are used, you will be asked to confirm your choice. At the prompt, press
I to confirm, or O to cancel.