HP (Hewlett-Packard) hp 49g+ Calculator User Manual


 
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the blue ALPHA key, key (7,1), can be combined with some of the other keys
to activate the alternative functions shown in the keyboard.
For example, the P key, key(4,4), has the following six functions associated
with it:
P Main function, to activate the SYMBolic menu
„´ Left-shift function, to activate the MTH (Math) menu
… N Right-shift function, to activate the CATalog function