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HP 25 User Manual

HP 25
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The HP-25 Means Painless Programming
11
Now
all
you
have
to do to
calculate
the
area
of
any
sphere
is
key
in
the
value
for
its
diameter
and
press
the~
(run/
stop)
key.
When
you
press
~
the
sequence
of
keystrokes
you
recorded
is
automatically
executed
by
the
calculator
, giving
you
the
same
answer
you
would
have
obtained
manually:
For
example,
to
calculate
the
a
rea
of
Ganymede:
Press
Display
3200
13200.
~
1
32169908.78
1
Square
miles.
With
the
program
you
have
recorded,
you
can
now
calculate
the
area
of
any
of
Jupiter
's
moons-in
fact,
of
any
sphere-using
its
diameter.
You
have
only
to leave the
calculator
in
RUN
mode and
key
in
the
diameter
of
each
sphere
that
you
wish to
compute,
then
press
~.
For
example
, to
compute
the
surface
area
of
Jupiter
's
moon
10
with a
diameter
of
2310 miles:
Press Display
231
0
~
1
16763852.56
1
Square
miles.
For
the
moons
Europa
,
diameter
1950
miles, and Callisto,
diameter
3220 miles:
Press
1950~
3220~
Display
1
11945906.07
1
32573289.27
Area
of
Europa
in
square
miles.
Area
of
Callisto in
square
miles.
Programming
the
HP-25 is
that
easy!
The
calculator
remembers
a
series
of
keystrokes
and
then
executes
them
when
you
press
the~ key.
The
early
portions
of
this
handbook
show
you
how
easy
it
is
to
manually use
the
power
of
the
HP-25;
while in
section
5,
Pro-
gramming,
you
will find a
complete
guide to HP-25
calculator
programming.
Even
if
you
have
used
other
pocket
calcula
tors
or
programmed
large
computers,
you will
want
to
take
a
good
look
at
this
handbook
.
It
explains
the
unique
HP
logic
system
that
makes
simple
answers
out
of
complex
problems
,
and
HP-25
features
that
make
programming painless.
When
you
see
the
simple
power
of
your
Hp-25
, you'll
become
an
apostle
just
as
have
some
700,000
HP
calculator
owners
before you.

Table of Contents

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HP 25 Specifications

General IconGeneral
Power SourceRechargeable battery pack
Programming Steps49
Release Year1975
FunctionsTrigonometric, logarithmic, statistical
TypeScientific
Dimensions148 x 80 x 14 mm

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