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HP 25 User Manual

HP 25
132 pages
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Page #49 background image
The
Automatic Memory
Stack
45
T 16.00
17
and
II
are
added
together
Z 16.00
and
the
rest
of
the s
tack
y
30.00
drops.
16
drop
s to Z and
is
X
28.00
also duplica
ted
in
T . 30
and
'----
28
are
rea
dy
to be a
dded
.
T
,----
30
and
28
are
added
together
16.00
Z
16.00
1
and
the
stack
drops
aga
in
.
y
16.00
I
Now
16
and
58
are
ready
to
X
58.00
be a
dded.
T
1
16
.
00
Z
16.00
16
and 58
are
added
together
y
1
16.00
for
the
final a
nswer
and
the
X
74.00
s
tack
continue
s to
drop
.
The
sa
me
dr
oppi
ng
action
also
occurs
with
El
, 0
and
G.
The
number
in
T
is
duplicated
in
T
and
Z,
the
numb
er
in
Z drops
to
Y,
and
the
numb
ers
in Y
and
X combine to give
the
answer
,
which
is
visible
in
the
X-register.
This
a
utom
atic lift
and
drop
of
the
s
tack
give you
tremendou
s
computing
power
,
since
you
can
retain and position int
er
-
m
ed
iate
result
s
in
long calcula
ti
ons
without
the
necessity
of
reentering
the
numbers.
Order of Execution
When
you
see
a
problem
like this one:
5 x [
(3
-i.
4)
-
(5
-i.
2) + (4 x 3)]
-i.
(3
x
.2
13),
yo
u
must
decide
whe
re to begin
before
yo
u
ever
pr
ess
a
key
.
Hewlett-
P
ackard
app
li
ca
tions
engineers
have
determined
that
by
starti
ng every
problem
at its
innermost
number
or
paren-
theses
and
working
outwa
rd, you maximize
the
efficiency and
power
of
your
H P
ca
lculat
or.
Of
course,
with
the
H P-25
you
h
ave
tremendous
versati
lity
in
the
orde
r
of
execution.

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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