HP 49g+ - Manual (Page 152)

Page 3-30
VALUE when selected, constants are shown without units
STK copies value (with or without units) to the stack
QUIT exit constants library
(*) Active only if the function VALUE is active.
This is the way the top of the CONSTANTS LIBRARY screen looks when the
option VALUE is selected (units in the SI system):
To see the values of the constants in the English (or Imperial) system, press the
@ENGL option:
If we de-select the UNITS option (press @UNITS ) only the values are shown
(English units selected in this case):
To copy the value of Vm to the stack, select the variable name, and
press !
²STK, then, press @QUIT@. For the calculator set to the ALG, the screen
will look like this: