Section 1: Getting Started; Display; Keyboard - HP -25 Owner's Handbook Manual

Section 1
Getting Started
Your HP-25 is shipped fully assembled, including a battery.
You can begin using your calculator immediately by connecting
the cord from the ac adapter/battery charger to the calculator
and plugging the charger into an ac outlet. If you want to use
your HP-25 on battery power alone, you should charge the bat-
tery for 6 hoursfirst. Whether you operate from battery power
or from power supplied by the charger, the battery must always
be in the calculator.
To begin:
= Slide the PRGM-RUN switch rrew Il »v to RUN.
= Slide the OFF-ON switch olto ON.
Display
With the PRGM-RUN switch set to RUN, the bright red dis-
play that you see when you turn the calculator ON gives you
two kinds of information:
1. You see numbers as you key them in.
2. You see all intermediate and final answers as they are
calculated.
When you first turn the calculator ON, the display is set to
to show you that all zeros are present there.
Keyboard
Most keys on the keyboard perform three functions. One func-
tion is indicated by the symbol on the flat face of the key, another
by the blue symbol on the slanted key face, and a third by the
gold symbol written above the key on the calculator case.
= To select the function printed in blue on the slanted face of
the key, first press the blue prefix key , then press the
function key.
= To select the function printed on the flat face of the key,
press the key.
= To select the function printed in gold above the key, first
press the gold prefix key , then press the function key.
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