Understanding The Display And Keyboard; The Cursor; Clearing The Calculator; Clearing Memory - HP -20S Owner's Manual

Understanding the Display and Keyboard
The Cursor
The cursor (—) is visible when you are in the process of entering a
number.
Clearing the Calculator
When the cursoris on, (] erases the last digit you entered. While you are
entering a number, pressing clears it to 0. Otherwise, clears the
display ofits current contents and cancels the current calculation.
While you are entering a number, pressing clears it to 0. Other-
wise, clears the display of its current contents and cancels the
current calculation.
Clearing Messages. (¢] and also clear messages. When the
HP-20S is displaying an error message, (4] or clears the message
and restores the original contents of the display.
Clearing Memory
To clear portions of memory:
Keys Description
(H) Clears registers Rg through Rg.
(] Clears statistical registers R4 through Rg.
(] [CLPRGM Clears programs when in Program mode.
12 1: Getting Started