HP 39g+ - Manual (Page 174)

12-6 Variables and memory management
4. Enter data for L2.
55 48 86
90 77
5. Press to access HOME.
6. Open the variable menu and select L1.
7. Copy it to the command line. Note: Because the
option is highlighted, the variable’s name,
rather than its contents, is copied to the command
line.
8. Insert the + operator and select the L2 variable from
the List variables.
9. Store the answer in the List catalog L3 variable.
L3
Note: You can also
type list names directly
from the keyboard.