HP 35s Scientific Calculator - Manual (Page 23)

Getting Started 1-7
To use a menu function:
1. Press a menu key to display a set of menu items.
2. Press Х
Ц Ч Ш
to move the underline to the item you want to select.
3. Press  while the item is underlined.
With numbered menu items, you can either press  while the item is
underlined, or just enter the number of the item.
Programming Instructions
FLAGS   
Functions to set, clear, and test flags.
14
x?y ≠ ≤ < > ≥ =
Comparison tests of the X–and Y–registers. 14
x?0 ≠ ≤ < > ≥ =
Comparison tests of the X–register and zero. 14
Other functions
MEM  
Memory status (bytes of memory available); catalog
of variables; catalog of programs (program labels).
1, 3, 12
MODE    

Angular modes and operation mode
4 , 1
DISPLAY
    
   
 

Fixed, scientific, engineering, full floating point
numerical display formats; radix symbol options (. or
,); complex number display format (in RPN mode,
only xiy and r
θa are available)
1
R R    
Functions to review the stack in ALG mode –X–, Y–,
Z–, T–registers
C
CLEAR Functions to clear different portions of memory—refer
to
 in the table on page 1–5.
1, 3,
6, 12