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HP 25 User Manual

HP 25
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The HP-25 Means Painless
Programming
Your
HP-25
is
a versatile, handheld
electronic
calculator
that
uses
the
powerful
Hewlett-P
a
ckard
logic
system
to
compute
answers
to
complex
mathematical
problems
in
either
of
two
modes
:
•
Manual
problem solving.
You
work
step-by-step
through
the
toughest
of
problems
,
choosing
from
among
the
dozen
s
of
functions available to
calculate
the
correct
a
nswer
quickly and easily.
•
Programmed
problem solving.
The
H P-25
memorizes
a
sequence
of
up to
49
different functions as you
press
them,
and
then
repeats
that
sequence
automatically
as often as
you wish to solve a
particular
type
of
problem.
That's
all
there
is
to
it!
A
pr
ogra
m
is
nothing
more
than
a se-
quence
of
manual
keystrokes
that
is
remembered
by the calcu-
lator.
You
can
then
execu
te the
progr
am as
often
as
you like.
No
prior
computer
pro
g
rammin
g
experience
is
necessary
for
H P-25
ca
lc
ulator
prog
rammin
g.
To
see
the
close
relationship
between
the manual solution to a
problem
and a
programmed
solution,
let's
solve a problem
manually,
and
then
use a
program
to solve the
same
problem
and
others
like it.
Manual Problem Solving
To
calculate
the
surface
area
of
a
sphere,
the formula A =
7r
d
2
can
be
used,
where: A
is
the
surface
area
,
7r
is
the value
of
pi
,
3.1415 ... , and
d
is
the
diameter
of
the
sphere.
Ganymede
,
one
of
Jupiter
's
12
moons
, has a
diameter
of
3200
miles.
To
use the H P-25 to manually
compute
the
area
of
Ganymede
, you
can
press
the
following
keys
in
order:
First,
slide the
calculator
OFF"ON
switch to
ON,
and
slide
the
PRGM"
RUN
switch
to
RUN.
Then
press Display
bB!33
~bH
1
3200.
II
=
~
--
!±}
1
1
0240000.00
1
9
Dia
meter
of
Ganymede
.
Square
of
the
diameter.

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HP 25 Specifications

General IconGeneral
BrandHP
Model25
CategoryCalculator
LanguageEnglish

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