HP 48gII - Manual (Page 791)

Page B-10
( A through Z). The numbers, mathematical symbols (-, +), decimal point (.),
and the space ( SPC) are the same as the main functions of these keys. The
~ function produces an asterisk (*) when combined with the times key, i.e.,
~*.
Alpha ~ functions of the calculator’s keyboard
Alpha-left-shift characters
The following sketch shows the characters associated with the different
calculator keys when the ALPHA
~ is combined with the left-shift key „.