HP Jornada 420 User Manual page 34

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Hewlett-Packard Jornada 420 Palm-size PC
Power, to maximize battery life.
System, to adjust memory allocation between storage memory
and program memory.
Password, to limit access to your P/PC.
Volume & Sounds, to customize or turn off sounds.
World Clock, to set the date and time for your location and a
second location.
For information on a particular setting, you can do either of the
following:
Open the setting, tap Start, and then tap Help.
Open the setting, and then tap and hold on the label of the
item you want more information about.