HP 50g Graphing Calculator - Manual (Page 808)

Page B-10
is used mainly to enter the upper-case letters of the English alphabet (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 „.