HP 35s Scientific Calculator - Manual (Page 204)

13-22 Simple Programming
Press   to move the program pointer to  .
Press   label nnn to move to a specific line.
If Program–entry mode is not active (if no program lines are displayed), you can
also move the program pointer by pressing
 label line number.
Canceling Program–entry mode does not change the position of the program
pointer.
Memory Usage
If during program entry you encounter the message  , then there is
not enough room in program memory for the line you just tried to enter. You can
make more room available by clearing programs or other data. See "Clearing One
or More Programs" below, or "Managing Calculator Memory" in appendix B.
The Catalog of Programs (MEM)
The catalog of programs is a list of all program labels with the number of bytes of
memory used by each label and the lines associated with it. Press

 (2) to display the catalog, and press Ø or × to move within the
list. You can use this catalog to:
Review the labels in program memory and the memory cost of each labeled
program or routine.
Execute a labeled program. (Press  or  while the label is
displayed.)
Display a labeled program. (Press   while the label is displayed.)
Delete specific programs. (Press  while the label is displayed.)
See the checksum associated with a given program segment. (Press 
 .)
The catalog shows you how many bytes of memory each labeled program segment
uses. The programs are identified by program label: